Dag Roar Hjelme
About
Dag Roar Hjelme is Professor at the Norwegian University of Science and Technology (NTNU), Faculty of Information Technology and Electrical Engineering, Department of Electronic Systems. With more than 30 years of experience in photonics and sensor systems, he has built a distinguished career spanning academia, industry, and innovation.
He earned his Ph.D. in Electrical Engineering from the University of Colorado, Boulder, and has since held leading roles as Chief Technology Officer in pioneering sensor companies. He co‑founded several ventures including Glucoset, MedXense, InvivoSense, and Optomed, and was among the researchers who established the Artificial Pancreas Trondheim research group. Earlier in his career, he worked as Senior Scientist at SINTEF Photonics, where he contributed to advances in both photonics and optical communication technologies.
Professor Hjelme has supervised more than 50 master’s and 15 Ph.D. students, published extensively in leading journals and conferences, and is the inventor on multiple international patents in fiber‑optic sensing. His contributions have been recognized with awards including the NTNU Research Prize in Medical Technology and election to the Norwegian Academy of Technological Sciences.
His current research focuses on advanced optical sensing technologies for medical diagnostics, energy systems, and biophotonics — continuing a career dedicated to bridging fundamental science with real‑world applications.
Teaching
TFE4166 Quantum Optics & Communication
FE8140 Optical, Electrical and Magnetic Characterization Techniques
Publications
2025
-
Yadav, Mukesh;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2025)
Highly sensitive multiplexed on-chip sensor.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Urban, David;
Hjelme, Dag Roar;
Descrovi, Emiliano.
(2025)
Novel effects in light-actuated systems based on dispersed azobenzene dyes and azopolymers.
Norges teknisk-naturvitenskapelige universitet
Norges teknisk-naturvitenskapelige universitet
Doctoral dissertation
-
Benam, Karim Davari;
Dirdal, Hasti Khoshamadi;
Åm, Marte Kierulf;
Christiansen, Sverre Christian;
Bösch, Patrick Christian;
Hjelme, Dag Roar.
(2025)
A Dual Hormone Predictive Controller for a Fully Automated Intraperitoneal Artificial Pancreas in Pigs.
Journal of Process Control
Academic article
2024
-
Jerve, Fredrik Wilsbeck;
Hjelme, Dag Roar;
Kalvøy, Håvard;
Allen, John;
Tronstad, Christian.
(2024)
Exploration of the Conditions for Occurrence of Photoplethysmographic Signal Inversion above the Dorsalis Pedis Artery.
Sensors
Academic article
2023
-
Grayson, Michael;
Krueper, Greg;
Xu, Bo;
Zohrabi, Mo;
Hjelme, Dag Roar;
Gopinath, Juliet.
(2023)
On-chip mid-infrared optical sensing with GeSbSe waveguides and resonators.
Optics Express
Academic article
-
Urban, David;
Marcucci, Niccolò;
Wölfle, Christoph Hubertus;
Torgersen, Jan;
Hjelme, Dag Roar;
Descrovi, Emiliano.
(2023)
Polarization-driven reversible actuation in a photo-responsive polymer composite.
Nature Communications
Academic article
2022
-
Schwermer, Silje Fuglerud;
Hjelme, Dag Roar;
Aksnes, Astrid;
Milenko, Karolina Barbara.
(2022)
Near Infrared Spectroscopy for Continuous Glucose Monitoring.
Norges teknisk-naturvitenskapelige universitet
Norges teknisk-naturvitenskapelige universitet
Doctoral dissertation
-
Muri, Harald Ian;
Hjelme, Dag Roar.
(2022)
Sensor Technology Options for Municipal Solid Waste Characterization for Optimal Operation of Waste-to-Energy Plants.
Energies
Academic article
-
Urban, David;
Hjelme, Dag Roar;
Descrovi, Emiliano.
(2022)
Polarized light guiding anisotropic deformation and relaxation in photosensitive polymeric substrates.
The European Physical Journal Conferences
Abstract
-
Schwermer, Silje Fuglerud;
Noh, Jong Wook;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2022)
Performance improvement in a supercontinuum fiber-coupled system for near infrared absorption spectroscopy.
Applied Optics
Academic article
2021
-
Osinski, Dominik;
Łukowska, Marta;
Hjelme, Dag Roar;
Michał, Wierzchoń.
(2021)
Colorophone 2.0: A Wearable Color Sonification Device Generating Live Stereo-Soundscapes—Design, Implementation, and Usability Audit.
Sensors
Academic article
-
Yadav, Mukesh;
Noh, Jong Wook;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2021)
Spectral shaping of ring resonator transmission response.
Optics Express
Academic article
-
Milenko, Karolina Barbara;
Yerolatsitis, Stephanos;
Aksnes, Astrid;
Hjelme, Dag Roar;
Stone, James M..
(2021)
Micro-lensed negative-curvature fibre probe for raman spectroscopy.
Sensors
Academic article
-
Muri, Harald Ian;
Hjelme, Dag Roar.
(2021)
Classification of municipal solid waste using deep convolutional neural network model applied to multispectral images.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Fuglerud, Silje Skeide;
Ellingsen, Reinold;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2021)
Investigation of the effect of clinically relevant interferents on glucose monitoring using near‐infrared spectroscopy.
Journal of Biophotonics
Academic article
2020
-
Jernelv, Ine Larsen;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2020)
Infrared measurements of glucose in peritoneal fluid with a tuneable quantum cascade laser.
Biomedical Optics Express
Academic article
-
Jernelv, Ine Larsen;
Hjelme, Dag Roar;
Matsuura, Yuji;
Aksnes, Astrid.
(2020)
Convolutional neural networks for classification and regression analysis of one-dimensional spectral data.
arXiv.org
Academic article
-
Jernelv, Ine Larsen;
Høvik, Jens;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2020)
Signal enhancement in microstructured silicon attenuated total reflection elements with quantum cascade laser-based spectroscopy.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Milenko, Karolina Barbara;
Fuglerud, Silje Skeide;
Aksnes, Astrid;
Ellingsen, Reinold;
Hjelme, Dag Roar.
(2020)
Optimization of SERS Sensing With Micro-Lensed Optical Fibers and Au Nano-Film.
Journal of Lightwave Technology
Academic article
-
Wahl, Markus Solberg;
Aasen, Ailo;
Hjelme, Dag Roar;
Wilhelmsen, Øivind.
(2020)
Ice formation and growth in supercooled water–alcohol mixtures: Theory and experiments with dual fiber sensors.
Fluid Phase Equilibria
Academic article
-
Wahl, Markus Solberg;
Wilhelmsen, Øivind;
Hjelme, Dag Roar.
(2020)
Using Fiber-Optic Sensors to Give Insight into Liquid-Solid Phase Transitions in Pure Fluids and Mixtures.
Experimental Thermal and Fluid Science
Academic article
-
Fuglerud, Silje Skeide;
Milenko, Karolina Barbara;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2020)
Surface-Enhanced Absorption Spectroscopy for Optical Fiber Sensing.
Materials
Academic article
-
Muri, Harald Ian;
Wahl, Markus Solberg;
Lamb, Jacob Joseph;
Snilsberg, Rolf Kristian;
Hjelme, Dag Roar.
(2020)
Sensor fusion.
Academic chapter/article/Conference paper
-
Wahl, Markus Solberg;
Muri, Harald Ian;
Snilsberg, Rolf Kristian;
Lamb, Jacob Joseph;
Hjelme, Dag Roar.
(2020)
Temperature and humidity measurements.
Academic chapter/article/Conference paper
-
Wahl, Markus Solberg;
Lamb, Jacob Joseph;
Muri, Harald Ian;
Snilsberg, Rolf Kristian;
Hjelme, Dag Roar.
(2020)
Light properties and sensors.
Academic chapter/article/Conference paper
-
Lamb, Jacob Joseph;
Burheim, Odne Stokke;
Hjelme, Dag Roar.
(2020)
Introduction.
Academic chapter/article/Conference paper
-
Muri, Harald Ian;
Lamb, Jacob Joseph;
Wahl, Markus Solberg;
Snilsberg, Rolf Kristian;
Hjelme, Dag Roar.
(2020)
Hydrogen gas measurements.
Academic chapter/article/Conference paper
-
Jernelv, Ine Larsen;
Strøm, Karina;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2020)
Mid-infrared spectroscopy with a fiber-coupled tuneable quantum cascade laser for glucose sensing.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
2019
-
Fuglerud, Silje Skeide;
Milenko, Karolina Barbara;
Ellingsen, Reinold;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2019)
Feasibility of supercontinuum sources for use in glucose sensing by absorption spectroscopy.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Lamb, Jacob Joseph;
Lien, Kristian Myklebust;
Hjelme, Dag Roar.
(2019)
Digitalization of colourimetric sensor arrays for volatile fatty acid detection in anaerobic digestion.
MethodsX
Academic article
-
Fuglerud, Silje Skeide;
Milenko, Karolina Barbara;
Ellingsen, Reinold;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2019)
Glucose sensing by absorption spectroscopy using lensed optical fibers.
Applied Optics
Academic article
-
Lamb, Jacob Joseph;
Hjelme, Dag Roar;
Lien, Kristian Myklebust.
(2019)
Carbohydrate Yield and Biomethane Potential from Enzymatically Hydrolysed Saccharina latissima and Its Industrial Potential.
Advances in microbiology
Academic article
-
Lamb, Jacob Joseph;
Islam, Md Hujjatul;
Hjelme, Dag Roar;
Pollet, Bruno;
Lien, Kristian Myklebust.
(2019)
Effect of power ultrasound and Fenton reagents on the biomethane potential from steam-exploded birchwood.
Ultrasonics sonochemistry
Academic article
-
Lamb, Jacob Joseph;
Bernard, Olivier;
Sarker, Shiplu;
Lien, Kristian Myklebust;
Hjelme, Dag Roar.
(2019)
Perspectives of optical colourimetric sensors for anaerobic digestion.
Renewable and Sustainable Energy Reviews
Academic literature review
-
Sarker, Shiplu;
Lamb, Jacob Joseph;
Hjelme, Dag Roar;
Lien, Kristian Myklebust.
(2019)
A review of the role of critical parameters in the design and operation of biogas production plants.
Applied Sciences
Academic literature review
-
Jernelv, Ine Larsen;
Strøm, Karina;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2019)
Infrared Spectroscopy with a Fiber-Coupled Quantum Cascade Laser for Attenuated Total Reflection Measurements Towards Biomedical Applications.
Sensors
Academic article
-
Åm, Marte Kierulf;
Fougner, Anders Lyngvi;
Ellingsen, Reinold;
Hjelme, Dag Roar;
Bösch, Patrick Christian;
Stavdahl, Øyvind.
(2019)
Erratum to “Why intraperitoneal glucose sensing is sometimes surprisingly rapid and sometimes slow: A hypothesis” [Med. Hypotheses 132 (2019) 109318].
Medical Hypotheses
Errata
-
Lamb, Jacob Joseph;
Bernard, Olivier;
Sarker, Shiplu;
Lien, Kristian Myklebust;
Hjelme, Dag Roar.
(2019)
Perspectives of surface plasmon resonance sensors for optimized biogas methanation.
Engineering in Life Sciences
Academic literature review
-
Åm, Marte Kierulf;
Fougner, Anders Lyngvi;
Ellingsen, Reinold;
Hjelme, Dag Roar;
Bösch, Patrick Christian;
Stavdahl, Øyvind.
(2019)
Why intraperitoneal glucose sensing is sometimes surprisingly rapid and sometimes slow: A hypothesis.
Medical Hypotheses
Academic article
-
Jernelv, Ine Larsen;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2019)
Mid-Infrared Tuneable Laser Spectroscopy for Glucose Sensing.
Norges teknisk-naturvitenskapelige universitet
Norges teknisk-naturvitenskapelige universitet
Doctoral dissertation
-
Wahl, Markus Solberg;
Wilhelmsen, Øivind;
Hjelme, Dag Roar.
(2019)
Addressing Challenges in Fabricating Reflection-Based Fiber Optic Interferometers.
Sensors
Academic article
2018
-
Åm, Marte Kierulf;
Kölle, Konstanze;
Fougner, Anders Lyngvi;
Dirnena-Fusini, Ilze;
Bösch, Patrick Christian;
Ellingsen, Reinold.
(2018)
Effect of sensor location on continuous intraperitoneal glucose sensing in an animal model.
PLOS ONE
Academic article
-
Muri, Harald Ian;
Bano, Andon;
Hjelme, Dag Roar.
(2018)
LSPR and Interferometric Sensor Modalities Combined Using a Double-Clad Optical Fiber.
Sensors
Academic article
-
Milenko, Karolina Barbara;
Jernelv, Ine Larsen;
Fuglerud, Silje Skeide;
Aksnes, Astrid;
Ellingsen, Reinold;
Hjelme, Dag Roar.
(2018)
Towards Fiber-Optic Raman Spectroscopy for Glucose Sensing.
Academic chapter/article/Conference paper
-
Muri, Harald Ian;
Bano, Andon;
Hjelme, Dag Roar.
(2018)
A single-point, multiparameter, fiber optic sensor based on a combination of interferometry and LSPR.
Journal of Lightwave Technology
Academic article
-
Fuglerud, Silje Skeide;
Milenko, Karolina Barbara;
Jernelv, Ine Larsen;
Ellingsen, Reinold;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2018)
A miniaturized ball-lensed fiber optic NIR transmission spectroscopy-based glucose sensor.
Academic chapter/article/Conference paper
-
Yadav, Mukesh;
Høvik, Jens;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2018)
Sensitivity enhanced biophotonic sensor utilizing sub-wavelength gratings.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Sarker, Shiplu;
Lamb, Jacob Joseph;
Hjelme, Dag Roar;
Lien, Kristian Myklebust.
(2018)
Overview of recent progress towards in-situ biogas upgradation techniques.
Fuel
Academic literature review
-
Milenko, Karolina Barbara;
Fuglerud, Silje Skeide;
Kjeldby, Snorre Braathen;
Ellingsen, Reinold;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2018)
Micro-lensed optical fibers for a surface-enhanced Raman scattering sensing probe.
Optics Letters
Academic article
-
Jernelv, Ine Larsen;
Milenko, Karolina Barbara;
Fuglerud, Silje Skeide;
Hjelme, Dag Roar;
Ellingsen, Reinold;
Aksnes, Astrid.
(2018)
A review of optical methods for continuous glucose monitoring.
Applied spectroscopy reviews (Softcover ed.)
Academic literature review
-
saldana, diego sanchez;
Hjelme, Dag Roar.
(2018)
online sensor concept for municipal solid waste characterization review.
NTNU and ENERSENSE
NTNU and ENERSENSE
Report
-
Jernelv, Ine Larsen;
Milenko, Karolina Barbara;
Ellingsen, Reinold;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2018)
Improving Multivariate Analysis in Mid-Infrared Spectroscopy for Biosensing.
Academic chapter/article/Conference paper
-
Lamb, Jacob Joseph;
Sarker, Shiplu;
Hjelme, Dag Roar;
Lien, Kristian Myklebust.
(2018)
Fermentative Bioethanol Production Using Enzymatically Hydrolysed Saccharina latissima.
Advances in microbiology
Academic article
-
Muri, Harald Ian;
Hoang, Linh;
Hjelme, Dag Roar.
(2018)
Mapping nanoparticles in hydrogels: A comparison of preparation methods for electron microscopy.
Applied Sciences
Academic article
-
Wahl, Markus Solberg;
Wilhelmsen, Øivind;
Hjelme, Dag Roar.
(2018)
Combined temperature and RI sensor for exploring the phase transitions of ethanol solutions.
Academic chapter/article/Conference paper
2017
-
Muri, Harald Ian;
Hjelme, Dag Roar.
(2017)
LSPR Coupling and Distribution of Interparticle Distances between Nanoparticles in Hydrogel on Optical Fiber End Face.
Sensors
Academic article
-
Hammarling, Krister;
Engholm, Magnus;
Muri, Harald Ian;
Wahl, Markus Solberg;
Hjelme, Dag Roar.
(2017)
Dual parameter fiber optic sensor combining a Fabry-Perot and a Mach-Zehnder interferometer.
Proceedings of IEEE Sensors
Academic article
-
Muri, Harald Ian;
Bano, Andon;
Hjelme, Dag Roar.
(2017)
Interferometric and localized surface plasmon based fiber optic sensor.
Progress in Biomedical Optics and Imaging
Academic article
-
Muri, Harald Ian;
Bano, Andon;
Hjelme, Dag Roar.
(2017)
First step towards an interferometric and localized surface plasmon fiber optic sensor.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
2016
-
Muri, Ian;
Hjelme, Dag Roar.
(2016)
Novel localized surface plasmon resonance based optical fiber sensor.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Fougner, Anders Lyngvi;
Kölle, Konstanze;
Skjaervold, Nils Kristian;
Elvemo, Nicolas-Andreas L.;
Hjelme, Dag Roar;
Ellingsen, Reinold.
(2016)
Intraperitoneal Glucose Sensing is Sometimes Surprisingly Rapid.
MIC Journal: Modeling, Identification and Control
Academic article
-
Bartholsen, Ingebrigt;
Hjelme, Dag Roar.
(2016)
Fast and accurate read-out of interferometric optical fiber sensors.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
2015
-
Strømstad, Håkon Grøn;
Hjelme, Dag Roar.
(2015)
Low-cost high performance readout system for fiber-optic biosensors.
Progress in Biomedical Optics and Imaging
Academic article
2014
-
Eriksen, Anders;
Osinski, Dominik;
Hjelme, Dag Roar.
(2014)
Evaluation of thermal imaging system and thermal radiation detector for real-time condition monitoring of high power frequency converters.
Advances in Manufacturing
Academic article
2013
-
Skjaervold, Nils Kristian;
Østling, Dan;
Hjelme, Dag Roar;
Spigset, Olav;
Lyng, Oddveig;
Aadahl, Petter.
(2013)
Blood Glucose Control Using a Novel Continuous Blood Glucose Monitor and Repetitive Intravenous Insulin Boluses: Exploiting Natural Insulin Pulsatility as a Principle for a Future Artificial Pancreas.
International Journal of Endocrinology
Academic article
-
Veisllari, Raimena;
Bjørnstad, Steinar;
Hjelme, Dag Roar.
(2013)
Experimental demonstration of high throughput, ultra-low delay variation packet/circuit fusion network.
Electronics Letters
Academic article
-
Eriksen, Anders;
Osinski, Dominik;
Hjelme, Dag Roar.
(2013)
Evaluation of thermal imaging system and thermal radiation detector for real-time condition monitoring of highpower frequency converters.
NTNU Engineering Series
Academic article
2011
-
Hjelme, Dag Roar;
Lydersen, Lars Vincent Van de Wiel;
Makarov, Vadim.
(2011)
Quantum Cryptography.
Academic chapter/article/Conference paper
-
Skjærvold, Nils Kristian;
Solligård, Erik;
Hjelme, Dag Roar;
Aadahl, Petter.
(2011)
Continuous Measurement of Blood Glucose Validation of a New Intravascular Sensor.
Anesthesiology
Academic article
2010
-
Tuft, Vegard Larsen;
Hjelme, Dag Roar;
Bjørnstad, Steinar.
(2010)
Automatic Polarization Control With Packet Transmission and the Effect of Traffic Patterns.
Journal of Lightwave Technology
Academic article
2009
-
Tierney, Sven;
Falch, Berit H.;
Hjelme, Dag Roar;
Stokke, Bjørn Torger.
(2009)
Determination of Glucose Levels Using a Functionalized Hydrogel-Optical Fiber Biosensor: Toward Continuous Monitoring of Blood Glucose in Vivo.
Analytical Chemistry
Academic article
-
Tuft, Vegard Larsen;
Bjørnstad, Steinar;
Hjelme, Dag Roar.
(2009)
Effect of traffic patterns on automatic polarization control with polarization and time-division multiplexed optical packet transmission.
Journal of Optical Networking
Academic article
2008
-
Tierney, Sven;
Hjelme, DR;
Stokke, Bjørn Torger.
(2008)
Determination of swelling of responsive gels with nanometer resolution. Fiber-optic based platform for hydrogels as signal transducers.
Analytical Chemistry
Academic article
2007
-
Bjørnstad, Steinar;
Nord, Martin;
Eriksen, Lars Erik;
Tuft, Vegard Larsen;
Hjelme, Dag Roar;
Stol, Norvald.
(2007)
Demonstration and analysis of TV- and data transport in the OpMiGua hybrid circuit/packet switched network testbed.
Academic chapter/article/Conference paper
-
Tuft, Vegard Larsen;
Bjørnstad, Steinar;
Hjelme, Dag Roar.
(2007)
Automatic polarization control for packet transmission in a hybrid circuit and packet switched optical network.
IEEE Photonics Technology Letters
Academic article
-
Larsen, Eivind La Puebla;
Randeberg, Lise Lyngsnes;
Gederaas, Odrun Arna;
Krokan, Hans Einar;
Hjelme, Dag Roar;
Svaasand, Lars O..
(2007)
In vitro study on methemoglobin formation in erythrocytes following hexyl-aminolevulinate induced photodynamic therapy.
Academic chapter/article/Conference paper
2006
-
Tuft, Vegard Larsen;
Hjelme, Dag Roar.
(2006)
The Effect of PDL in a Polarization and Time Division Multiplexed Scheme for All-Optical Class of Service Segregation.
Academic chapter/article/Conference paper
-
Bjørnstad, Steinar;
Eriksen, Lars Erik;
Hjelme, Dag Roar.
(2006)
The OpMiGua multiservice optical hybrid packet/circuit switched network supporting TV-broadcasting QoS requirements.
Academic chapter/article/Conference paper
-
Nord, Martin;
Bjørnstad, Steinar;
Tuft, Vegard;
Kimsås, Andreas;
Hjelme, Dag Roar;
Eriksen, Lars Erik.
(2006)
The OpMiGua project - final report.
Telenor R&I
Telenor R&I
Report
-
Nord, Martin;
Bjornstad, Steinar;
Bjørnstad, Steinar;
Austad, Oddgeir;
Tuft, Vegard Larsen;
Hjelme, Dag Roar.
(2006)
OpMiGua Hybrid Circuit- and Packet-Switched Test-Bed Demonstration and Performance.
IEEE Photonics Technology Letters
Academic article
-
Larsen, Eivind La Puebla;
Randeberg, Lise Lyngsnes;
Gederaas, Odrun Arna;
Arum, Carl-Jørgen;
Krokan, Hans Einar;
Chen, Duan.
(2006)
Monitoring of hALA induced PDT in rat bladder cancer by optical spectroscopy.
Lasers in Surgery and Medicine
Abstract
-
Nord, Martin;
Bjørnstad, Steinar;
Austad, Oddgeir;
Tuft, Vegard;
Hjelme, Dag roar;
Sudbø, Aasmund Sveinung.
(2006)
Hybrid circuit- and packet switched test-bed.
IEEE Photonics Technology Letters
Academic article
-
Tuft, Vegard Larsen;
Buron, Jakob;
Hjelme, Dag Roar;
Bjørnstad, Steinar.
(2006)
Demonstration of an All-Optical Class-of-Service Segregation Method for Edge Nodes in Hybrid Circuit/Packet Switched Networks.
Academic chapter/article/Conference paper
-
Bjørnstad, Steinar;
Nord, Martin;
Tuft, Vegard Larsen;
Austad, Oddgeir;
Hjelme, Dag Roar;
Eriksen, Lars Erik.
(2006)
Experimental Demonstration of OpMiGua Hybrid Circuit/Packet Nodes.
Academic chapter/article/Conference paper
-
Bjørnstad, Steinar;
Hjelme, Dag Roar;
Stol, Norvald.
(2006)
A Packet-Switched Hybrid Optical Network with Service Guarantees.
IEEE Journal on Selected Areas in Communications
Academic article
2005
-
Makarov, Vadim;
Hjelme, Dag Roar.
(2005)
Faked states attack on quantum cryptosystems.
Journal of Modern Optics
Academic article
-
Bjørnstad, Steinar;
Øverby, Harald;
Stol, Norvald;
Hjelme, Dag Roar.
(2005)
Protecting guaranteed service traffic in an OpMiGua hybrid network.
Academic chapter/article/Conference paper
-
Bjørnstad, Steinar;
Nord, Martin;
Olsen, Torodd;
Hjelme, Dag Roar;
Stol, Norvald.
(2005)
Burst, packet and hybrid switching in the optical core network.
Telektronikk
Academic article
2004
-
Makarov, Vadim;
Brylevski, Alexey;
Hjelme, Dag Roar.
(2004)
Real-time phase tracking in single-photon interferometers.
Applied Optics
Academic article
2001
-
Vakhitov, Artem;
Makarov, Vadim;
Hjelme, Dag Roar.
(2001)
Large pulse attack as a method of conventional optical eavesdropping in quantum cryptography.
Journal of Modern Optics
Academic article
1998
-
Hjelme, Dag Roar;
Storøy, Helge;
Skaar, Johannes.
(1998)
Reconfigurable all-optical crossconnect node using synthesized fiber Bragg gratings for both demultiplexing and switching.
OSA Trends in Optics and Photonics
Academic article
Journal publications
-
Yadav, Mukesh;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2025)
Highly sensitive multiplexed on-chip sensor.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Benam, Karim Davari;
Dirdal, Hasti Khoshamadi;
Åm, Marte Kierulf;
Christiansen, Sverre Christian;
Bösch, Patrick Christian;
Hjelme, Dag Roar.
(2025)
A Dual Hormone Predictive Controller for a Fully Automated Intraperitoneal Artificial Pancreas in Pigs.
Journal of Process Control
Academic article
-
Jerve, Fredrik Wilsbeck;
Hjelme, Dag Roar;
Kalvøy, Håvard;
Allen, John;
Tronstad, Christian.
(2024)
Exploration of the Conditions for Occurrence of Photoplethysmographic Signal Inversion above the Dorsalis Pedis Artery.
Sensors
Academic article
-
Grayson, Michael;
Krueper, Greg;
Xu, Bo;
Zohrabi, Mo;
Hjelme, Dag Roar;
Gopinath, Juliet.
(2023)
On-chip mid-infrared optical sensing with GeSbSe waveguides and resonators.
Optics Express
Academic article
-
Urban, David;
Marcucci, Niccolò;
Wölfle, Christoph Hubertus;
Torgersen, Jan;
Hjelme, Dag Roar;
Descrovi, Emiliano.
(2023)
Polarization-driven reversible actuation in a photo-responsive polymer composite.
Nature Communications
Academic article
-
Muri, Harald Ian;
Hjelme, Dag Roar.
(2022)
Sensor Technology Options for Municipal Solid Waste Characterization for Optimal Operation of Waste-to-Energy Plants.
Energies
Academic article
-
Urban, David;
Hjelme, Dag Roar;
Descrovi, Emiliano.
(2022)
Polarized light guiding anisotropic deformation and relaxation in photosensitive polymeric substrates.
The European Physical Journal Conferences
Abstract
-
Schwermer, Silje Fuglerud;
Noh, Jong Wook;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2022)
Performance improvement in a supercontinuum fiber-coupled system for near infrared absorption spectroscopy.
Applied Optics
Academic article
-
Osinski, Dominik;
Łukowska, Marta;
Hjelme, Dag Roar;
Michał, Wierzchoń.
(2021)
Colorophone 2.0: A Wearable Color Sonification Device Generating Live Stereo-Soundscapes—Design, Implementation, and Usability Audit.
Sensors
Academic article
-
Yadav, Mukesh;
Noh, Jong Wook;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2021)
Spectral shaping of ring resonator transmission response.
Optics Express
Academic article
-
Milenko, Karolina Barbara;
Yerolatsitis, Stephanos;
Aksnes, Astrid;
Hjelme, Dag Roar;
Stone, James M..
(2021)
Micro-lensed negative-curvature fibre probe for raman spectroscopy.
Sensors
Academic article
-
Muri, Harald Ian;
Hjelme, Dag Roar.
(2021)
Classification of municipal solid waste using deep convolutional neural network model applied to multispectral images.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Fuglerud, Silje Skeide;
Ellingsen, Reinold;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2021)
Investigation of the effect of clinically relevant interferents on glucose monitoring using near‐infrared spectroscopy.
Journal of Biophotonics
Academic article
-
Jernelv, Ine Larsen;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2020)
Infrared measurements of glucose in peritoneal fluid with a tuneable quantum cascade laser.
Biomedical Optics Express
Academic article
-
Jernelv, Ine Larsen;
Hjelme, Dag Roar;
Matsuura, Yuji;
Aksnes, Astrid.
(2020)
Convolutional neural networks for classification and regression analysis of one-dimensional spectral data.
arXiv.org
Academic article
-
Jernelv, Ine Larsen;
Høvik, Jens;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2020)
Signal enhancement in microstructured silicon attenuated total reflection elements with quantum cascade laser-based spectroscopy.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Milenko, Karolina Barbara;
Fuglerud, Silje Skeide;
Aksnes, Astrid;
Ellingsen, Reinold;
Hjelme, Dag Roar.
(2020)
Optimization of SERS Sensing With Micro-Lensed Optical Fibers and Au Nano-Film.
Journal of Lightwave Technology
Academic article
-
Wahl, Markus Solberg;
Aasen, Ailo;
Hjelme, Dag Roar;
Wilhelmsen, Øivind.
(2020)
Ice formation and growth in supercooled water–alcohol mixtures: Theory and experiments with dual fiber sensors.
Fluid Phase Equilibria
Academic article
-
Wahl, Markus Solberg;
Wilhelmsen, Øivind;
Hjelme, Dag Roar.
(2020)
Using Fiber-Optic Sensors to Give Insight into Liquid-Solid Phase Transitions in Pure Fluids and Mixtures.
Experimental Thermal and Fluid Science
Academic article
-
Fuglerud, Silje Skeide;
Milenko, Karolina Barbara;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2020)
Surface-Enhanced Absorption Spectroscopy for Optical Fiber Sensing.
Materials
Academic article
-
Jernelv, Ine Larsen;
Strøm, Karina;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2020)
Mid-infrared spectroscopy with a fiber-coupled tuneable quantum cascade laser for glucose sensing.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Fuglerud, Silje Skeide;
Milenko, Karolina Barbara;
Ellingsen, Reinold;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2019)
Feasibility of supercontinuum sources for use in glucose sensing by absorption spectroscopy.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Lamb, Jacob Joseph;
Lien, Kristian Myklebust;
Hjelme, Dag Roar.
(2019)
Digitalization of colourimetric sensor arrays for volatile fatty acid detection in anaerobic digestion.
MethodsX
Academic article
-
Fuglerud, Silje Skeide;
Milenko, Karolina Barbara;
Ellingsen, Reinold;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2019)
Glucose sensing by absorption spectroscopy using lensed optical fibers.
Applied Optics
Academic article
-
Lamb, Jacob Joseph;
Hjelme, Dag Roar;
Lien, Kristian Myklebust.
(2019)
Carbohydrate Yield and Biomethane Potential from Enzymatically Hydrolysed Saccharina latissima and Its Industrial Potential.
Advances in microbiology
Academic article
-
Lamb, Jacob Joseph;
Islam, Md Hujjatul;
Hjelme, Dag Roar;
Pollet, Bruno;
Lien, Kristian Myklebust.
(2019)
Effect of power ultrasound and Fenton reagents on the biomethane potential from steam-exploded birchwood.
Ultrasonics sonochemistry
Academic article
-
Lamb, Jacob Joseph;
Bernard, Olivier;
Sarker, Shiplu;
Lien, Kristian Myklebust;
Hjelme, Dag Roar.
(2019)
Perspectives of optical colourimetric sensors for anaerobic digestion.
Renewable and Sustainable Energy Reviews
Academic literature review
-
Sarker, Shiplu;
Lamb, Jacob Joseph;
Hjelme, Dag Roar;
Lien, Kristian Myklebust.
(2019)
A review of the role of critical parameters in the design and operation of biogas production plants.
Applied Sciences
Academic literature review
-
Jernelv, Ine Larsen;
Strøm, Karina;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2019)
Infrared Spectroscopy with a Fiber-Coupled Quantum Cascade Laser for Attenuated Total Reflection Measurements Towards Biomedical Applications.
Sensors
Academic article
-
Åm, Marte Kierulf;
Fougner, Anders Lyngvi;
Ellingsen, Reinold;
Hjelme, Dag Roar;
Bösch, Patrick Christian;
Stavdahl, Øyvind.
(2019)
Erratum to “Why intraperitoneal glucose sensing is sometimes surprisingly rapid and sometimes slow: A hypothesis” [Med. Hypotheses 132 (2019) 109318].
Medical Hypotheses
Errata
-
Lamb, Jacob Joseph;
Bernard, Olivier;
Sarker, Shiplu;
Lien, Kristian Myklebust;
Hjelme, Dag Roar.
(2019)
Perspectives of surface plasmon resonance sensors for optimized biogas methanation.
Engineering in Life Sciences
Academic literature review
-
Åm, Marte Kierulf;
Fougner, Anders Lyngvi;
Ellingsen, Reinold;
Hjelme, Dag Roar;
Bösch, Patrick Christian;
Stavdahl, Øyvind.
(2019)
Why intraperitoneal glucose sensing is sometimes surprisingly rapid and sometimes slow: A hypothesis.
Medical Hypotheses
Academic article
-
Wahl, Markus Solberg;
Wilhelmsen, Øivind;
Hjelme, Dag Roar.
(2019)
Addressing Challenges in Fabricating Reflection-Based Fiber Optic Interferometers.
Sensors
Academic article
-
Åm, Marte Kierulf;
Kölle, Konstanze;
Fougner, Anders Lyngvi;
Dirnena-Fusini, Ilze;
Bösch, Patrick Christian;
Ellingsen, Reinold.
(2018)
Effect of sensor location on continuous intraperitoneal glucose sensing in an animal model.
PLOS ONE
Academic article
-
Muri, Harald Ian;
Bano, Andon;
Hjelme, Dag Roar.
(2018)
LSPR and Interferometric Sensor Modalities Combined Using a Double-Clad Optical Fiber.
Sensors
Academic article
-
Muri, Harald Ian;
Bano, Andon;
Hjelme, Dag Roar.
(2018)
A single-point, multiparameter, fiber optic sensor based on a combination of interferometry and LSPR.
Journal of Lightwave Technology
Academic article
-
Yadav, Mukesh;
Høvik, Jens;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2018)
Sensitivity enhanced biophotonic sensor utilizing sub-wavelength gratings.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Sarker, Shiplu;
Lamb, Jacob Joseph;
Hjelme, Dag Roar;
Lien, Kristian Myklebust.
(2018)
Overview of recent progress towards in-situ biogas upgradation techniques.
Fuel
Academic literature review
-
Milenko, Karolina Barbara;
Fuglerud, Silje Skeide;
Kjeldby, Snorre Braathen;
Ellingsen, Reinold;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2018)
Micro-lensed optical fibers for a surface-enhanced Raman scattering sensing probe.
Optics Letters
Academic article
-
Jernelv, Ine Larsen;
Milenko, Karolina Barbara;
Fuglerud, Silje Skeide;
Hjelme, Dag Roar;
Ellingsen, Reinold;
Aksnes, Astrid.
(2018)
A review of optical methods for continuous glucose monitoring.
Applied spectroscopy reviews (Softcover ed.)
Academic literature review
-
Lamb, Jacob Joseph;
Sarker, Shiplu;
Hjelme, Dag Roar;
Lien, Kristian Myklebust.
(2018)
Fermentative Bioethanol Production Using Enzymatically Hydrolysed Saccharina latissima.
Advances in microbiology
Academic article
-
Muri, Harald Ian;
Hoang, Linh;
Hjelme, Dag Roar.
(2018)
Mapping nanoparticles in hydrogels: A comparison of preparation methods for electron microscopy.
Applied Sciences
Academic article
-
Muri, Harald Ian;
Hjelme, Dag Roar.
(2017)
LSPR Coupling and Distribution of Interparticle Distances between Nanoparticles in Hydrogel on Optical Fiber End Face.
Sensors
Academic article
-
Hammarling, Krister;
Engholm, Magnus;
Muri, Harald Ian;
Wahl, Markus Solberg;
Hjelme, Dag Roar.
(2017)
Dual parameter fiber optic sensor combining a Fabry-Perot and a Mach-Zehnder interferometer.
Proceedings of IEEE Sensors
Academic article
-
Muri, Harald Ian;
Bano, Andon;
Hjelme, Dag Roar.
(2017)
Interferometric and localized surface plasmon based fiber optic sensor.
Progress in Biomedical Optics and Imaging
Academic article
-
Muri, Harald Ian;
Bano, Andon;
Hjelme, Dag Roar.
(2017)
First step towards an interferometric and localized surface plasmon fiber optic sensor.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Muri, Ian;
Hjelme, Dag Roar.
(2016)
Novel localized surface plasmon resonance based optical fiber sensor.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Fougner, Anders Lyngvi;
Kölle, Konstanze;
Skjaervold, Nils Kristian;
Elvemo, Nicolas-Andreas L.;
Hjelme, Dag Roar;
Ellingsen, Reinold.
(2016)
Intraperitoneal Glucose Sensing is Sometimes Surprisingly Rapid.
MIC Journal: Modeling, Identification and Control
Academic article
-
Bartholsen, Ingebrigt;
Hjelme, Dag Roar.
(2016)
Fast and accurate read-out of interferometric optical fiber sensors.
Proceedings of SPIE, the International Society for Optical Engineering
Academic article
-
Strømstad, Håkon Grøn;
Hjelme, Dag Roar.
(2015)
Low-cost high performance readout system for fiber-optic biosensors.
Progress in Biomedical Optics and Imaging
Academic article
-
Eriksen, Anders;
Osinski, Dominik;
Hjelme, Dag Roar.
(2014)
Evaluation of thermal imaging system and thermal radiation detector for real-time condition monitoring of high power frequency converters.
Advances in Manufacturing
Academic article
-
Skjaervold, Nils Kristian;
Østling, Dan;
Hjelme, Dag Roar;
Spigset, Olav;
Lyng, Oddveig;
Aadahl, Petter.
(2013)
Blood Glucose Control Using a Novel Continuous Blood Glucose Monitor and Repetitive Intravenous Insulin Boluses: Exploiting Natural Insulin Pulsatility as a Principle for a Future Artificial Pancreas.
International Journal of Endocrinology
Academic article
-
Veisllari, Raimena;
Bjørnstad, Steinar;
Hjelme, Dag Roar.
(2013)
Experimental demonstration of high throughput, ultra-low delay variation packet/circuit fusion network.
Electronics Letters
Academic article
-
Eriksen, Anders;
Osinski, Dominik;
Hjelme, Dag Roar.
(2013)
Evaluation of thermal imaging system and thermal radiation detector for real-time condition monitoring of highpower frequency converters.
NTNU Engineering Series
Academic article
-
Skjærvold, Nils Kristian;
Solligård, Erik;
Hjelme, Dag Roar;
Aadahl, Petter.
(2011)
Continuous Measurement of Blood Glucose Validation of a New Intravascular Sensor.
Anesthesiology
Academic article
-
Tuft, Vegard Larsen;
Hjelme, Dag Roar;
Bjørnstad, Steinar.
(2010)
Automatic Polarization Control With Packet Transmission and the Effect of Traffic Patterns.
Journal of Lightwave Technology
Academic article
-
Tierney, Sven;
Falch, Berit H.;
Hjelme, Dag Roar;
Stokke, Bjørn Torger.
(2009)
Determination of Glucose Levels Using a Functionalized Hydrogel-Optical Fiber Biosensor: Toward Continuous Monitoring of Blood Glucose in Vivo.
Analytical Chemistry
Academic article
-
Tuft, Vegard Larsen;
Bjørnstad, Steinar;
Hjelme, Dag Roar.
(2009)
Effect of traffic patterns on automatic polarization control with polarization and time-division multiplexed optical packet transmission.
Journal of Optical Networking
Academic article
-
Tierney, Sven;
Hjelme, DR;
Stokke, Bjørn Torger.
(2008)
Determination of swelling of responsive gels with nanometer resolution. Fiber-optic based platform for hydrogels as signal transducers.
Analytical Chemistry
Academic article
-
Tuft, Vegard Larsen;
Bjørnstad, Steinar;
Hjelme, Dag Roar.
(2007)
Automatic polarization control for packet transmission in a hybrid circuit and packet switched optical network.
IEEE Photonics Technology Letters
Academic article
-
Nord, Martin;
Bjornstad, Steinar;
Bjørnstad, Steinar;
Austad, Oddgeir;
Tuft, Vegard Larsen;
Hjelme, Dag Roar.
(2006)
OpMiGua Hybrid Circuit- and Packet-Switched Test-Bed Demonstration and Performance.
IEEE Photonics Technology Letters
Academic article
-
Larsen, Eivind La Puebla;
Randeberg, Lise Lyngsnes;
Gederaas, Odrun Arna;
Arum, Carl-Jørgen;
Krokan, Hans Einar;
Chen, Duan.
(2006)
Monitoring of hALA induced PDT in rat bladder cancer by optical spectroscopy.
Lasers in Surgery and Medicine
Abstract
-
Nord, Martin;
Bjørnstad, Steinar;
Austad, Oddgeir;
Tuft, Vegard;
Hjelme, Dag roar;
Sudbø, Aasmund Sveinung.
(2006)
Hybrid circuit- and packet switched test-bed.
IEEE Photonics Technology Letters
Academic article
-
Bjørnstad, Steinar;
Hjelme, Dag Roar;
Stol, Norvald.
(2006)
A Packet-Switched Hybrid Optical Network with Service Guarantees.
IEEE Journal on Selected Areas in Communications
Academic article
-
Makarov, Vadim;
Hjelme, Dag Roar.
(2005)
Faked states attack on quantum cryptosystems.
Journal of Modern Optics
Academic article
-
Bjørnstad, Steinar;
Nord, Martin;
Olsen, Torodd;
Hjelme, Dag Roar;
Stol, Norvald.
(2005)
Burst, packet and hybrid switching in the optical core network.
Telektronikk
Academic article
-
Makarov, Vadim;
Brylevski, Alexey;
Hjelme, Dag Roar.
(2004)
Real-time phase tracking in single-photon interferometers.
Applied Optics
Academic article
-
Vakhitov, Artem;
Makarov, Vadim;
Hjelme, Dag Roar.
(2001)
Large pulse attack as a method of conventional optical eavesdropping in quantum cryptography.
Journal of Modern Optics
Academic article
-
Hjelme, Dag Roar;
Storøy, Helge;
Skaar, Johannes.
(1998)
Reconfigurable all-optical crossconnect node using synthesized fiber Bragg gratings for both demultiplexing and switching.
OSA Trends in Optics and Photonics
Academic article
Part of book/report
-
Muri, Harald Ian;
Wahl, Markus Solberg;
Lamb, Jacob Joseph;
Snilsberg, Rolf Kristian;
Hjelme, Dag Roar.
(2020)
Sensor fusion.
Academic chapter/article/Conference paper
-
Wahl, Markus Solberg;
Muri, Harald Ian;
Snilsberg, Rolf Kristian;
Lamb, Jacob Joseph;
Hjelme, Dag Roar.
(2020)
Temperature and humidity measurements.
Academic chapter/article/Conference paper
-
Wahl, Markus Solberg;
Lamb, Jacob Joseph;
Muri, Harald Ian;
Snilsberg, Rolf Kristian;
Hjelme, Dag Roar.
(2020)
Light properties and sensors.
Academic chapter/article/Conference paper
-
Lamb, Jacob Joseph;
Burheim, Odne Stokke;
Hjelme, Dag Roar.
(2020)
Introduction.
Academic chapter/article/Conference paper
-
Muri, Harald Ian;
Lamb, Jacob Joseph;
Wahl, Markus Solberg;
Snilsberg, Rolf Kristian;
Hjelme, Dag Roar.
(2020)
Hydrogen gas measurements.
Academic chapter/article/Conference paper
-
Milenko, Karolina Barbara;
Jernelv, Ine Larsen;
Fuglerud, Silje Skeide;
Aksnes, Astrid;
Ellingsen, Reinold;
Hjelme, Dag Roar.
(2018)
Towards Fiber-Optic Raman Spectroscopy for Glucose Sensing.
Academic chapter/article/Conference paper
-
Fuglerud, Silje Skeide;
Milenko, Karolina Barbara;
Jernelv, Ine Larsen;
Ellingsen, Reinold;
Aksnes, Astrid;
Hjelme, Dag Roar.
(2018)
A miniaturized ball-lensed fiber optic NIR transmission spectroscopy-based glucose sensor.
Academic chapter/article/Conference paper
-
Jernelv, Ine Larsen;
Milenko, Karolina Barbara;
Ellingsen, Reinold;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2018)
Improving Multivariate Analysis in Mid-Infrared Spectroscopy for Biosensing.
Academic chapter/article/Conference paper
-
Wahl, Markus Solberg;
Wilhelmsen, Øivind;
Hjelme, Dag Roar.
(2018)
Combined temperature and RI sensor for exploring the phase transitions of ethanol solutions.
Academic chapter/article/Conference paper
-
Hjelme, Dag Roar;
Lydersen, Lars Vincent Van de Wiel;
Makarov, Vadim.
(2011)
Quantum Cryptography.
Academic chapter/article/Conference paper
-
Bjørnstad, Steinar;
Nord, Martin;
Eriksen, Lars Erik;
Tuft, Vegard Larsen;
Hjelme, Dag Roar;
Stol, Norvald.
(2007)
Demonstration and analysis of TV- and data transport in the OpMiGua hybrid circuit/packet switched network testbed.
Academic chapter/article/Conference paper
-
Larsen, Eivind La Puebla;
Randeberg, Lise Lyngsnes;
Gederaas, Odrun Arna;
Krokan, Hans Einar;
Hjelme, Dag Roar;
Svaasand, Lars O..
(2007)
In vitro study on methemoglobin formation in erythrocytes following hexyl-aminolevulinate induced photodynamic therapy.
Academic chapter/article/Conference paper
-
Tuft, Vegard Larsen;
Hjelme, Dag Roar.
(2006)
The Effect of PDL in a Polarization and Time Division Multiplexed Scheme for All-Optical Class of Service Segregation.
Academic chapter/article/Conference paper
-
Bjørnstad, Steinar;
Eriksen, Lars Erik;
Hjelme, Dag Roar.
(2006)
The OpMiGua multiservice optical hybrid packet/circuit switched network supporting TV-broadcasting QoS requirements.
Academic chapter/article/Conference paper
-
Tuft, Vegard Larsen;
Buron, Jakob;
Hjelme, Dag Roar;
Bjørnstad, Steinar.
(2006)
Demonstration of an All-Optical Class-of-Service Segregation Method for Edge Nodes in Hybrid Circuit/Packet Switched Networks.
Academic chapter/article/Conference paper
-
Bjørnstad, Steinar;
Nord, Martin;
Tuft, Vegard Larsen;
Austad, Oddgeir;
Hjelme, Dag Roar;
Eriksen, Lars Erik.
(2006)
Experimental Demonstration of OpMiGua Hybrid Circuit/Packet Nodes.
Academic chapter/article/Conference paper
-
Bjørnstad, Steinar;
Øverby, Harald;
Stol, Norvald;
Hjelme, Dag Roar.
(2005)
Protecting guaranteed service traffic in an OpMiGua hybrid network.
Academic chapter/article/Conference paper
Report
-
Urban, David;
Hjelme, Dag Roar;
Descrovi, Emiliano.
(2025)
Novel effects in light-actuated systems based on dispersed azobenzene dyes and azopolymers.
Norges teknisk-naturvitenskapelige universitet
Norges teknisk-naturvitenskapelige universitet
Doctoral dissertation
-
Schwermer, Silje Fuglerud;
Hjelme, Dag Roar;
Aksnes, Astrid;
Milenko, Karolina Barbara.
(2022)
Near Infrared Spectroscopy for Continuous Glucose Monitoring.
Norges teknisk-naturvitenskapelige universitet
Norges teknisk-naturvitenskapelige universitet
Doctoral dissertation
-
Jernelv, Ine Larsen;
Hjelme, Dag Roar;
Aksnes, Astrid.
(2019)
Mid-Infrared Tuneable Laser Spectroscopy for Glucose Sensing.
Norges teknisk-naturvitenskapelige universitet
Norges teknisk-naturvitenskapelige universitet
Doctoral dissertation
-
saldana, diego sanchez;
Hjelme, Dag Roar.
(2018)
online sensor concept for municipal solid waste characterization review.
NTNU and ENERSENSE
NTNU and ENERSENSE
Report
-
Nord, Martin;
Bjørnstad, Steinar;
Tuft, Vegard;
Kimsås, Andreas;
Hjelme, Dag Roar;
Eriksen, Lars Erik.
(2006)
The OpMiGua project - final report.
Telenor R&I
Telenor R&I
Report
Teaching
Courses
- FE8123 - PhD Seminar in Nanoelectronics and Photonics
- TFE4202 - Sensor Systems Design 1
- IELET3109 - Advanced Sensorsystems
- IELS2031 - Electronics Design
- TFE4166 - Quantum optics & communication
- TFE4930 - Electronic Systems Design, Master's Thesis
- TFE4204 - Sensor Systems Design 2
- TFE4161 - Photonics I
- TFE4590 - Electronic Systems Design, Specialization Project
- IELS3001 - Engineering project IV
- IELS3011 - Advanced Sensor Systems
- FE8140 - Optical, Electrical and Magnetic Characterization Techniques
Outreach
2025
-
Academic lectureFried, Michael Aron; Hjelme, Dag Roar. (2025) Novel tunable diode laser spectroscopy with square wave injection current modulation and simple calibration. SPIE Photonic West , San Francisco 17.01.2025 - 22.04.2025
-
InterviewCarlsen, Sven Magnus; Berg, Hilde Kjeldstad; Stavdahl, Øyvind; Ellingsen, Reinold; Hjelme, Dag Roar; Christiansen, Sverre Christian. (2025) Gir pasienter med diabetes type 1 et enklere liv. Helse Midt-Norge: Nyheter Helse Midt-Norge: Nyheter [Internet] 10.06.2025
-
PosterBjørkkjær, Asbjørn; Li, Jin; Hjelme, Dag Roar; Goa, Pål Erik; Nyman, Axel Karl Gottfrid. (2025) GluCEST imaging for mapping neurometabolism. MR 2025 — the 18th biennial conference of the Norwegian Society for Magnetic Resonance , Bergen 26.05.2025 - 27.05.2025
2024
-
InterviewNormannsen, Sølvi Waterloo; Carlsen, Sven Magnus; Berg, Hilde Kjeldstad; Stavdahl, Øyvind; Ellingsen, Reinold; Hjelme, Dag Roar. (2024) Ny insulin-miks kan gi pasienter med diabetes type 1 et lettere liv. Forskning.no Forskning.no [Internet] 14.01.2024
-
Academic lectureYadav, Mukesh; Hjelme, Dag Roar; Aksnes, Astrid. (2024) Optical On-chip Xenobiotic Sensor. Norwegian Electro-optics Meeting 2024 , Oscarsborg Fortress Hotel and Resort, Oslo 21.05.2024 - 24.05.2024
-
Academic lectureBjørnstad, Steinar; Vaskinn, Kristina Skarvang; Hjelme, Dag Roar; Tunheim, Asbjørn; Fjermestad, Frode; Østerli, Eivind. (2024) First Impact Movement Characterization of Shallow Buried Live Subsea-Cable. 2024 Optical Fiber Communications Conference and Exhibition (OFC) , San Diego, CA 24.03.2024 - 28.03.2024
-
InterviewCarlsen, Sven Magnus; Berg, Hilde Kjeldstad; Stavdahl, Øyvind; Ellingsen, Reinold; Hjelme, Dag Roar; Christiansen, Sverre Christian. (2024) Norsk forskning: Ny medisin kan forenkle livet til type 1-diabetikere. VG Pluss VG Pluss [Internet] 08.02.2024
-
InterviewNormannsen, Sølvi Waterloo; Carlsen, Sven Magnus; Berg, Hilde Kjeldstad; Stavdahl, Øyvind; Ellingsen, Reinold; Hjelme, Dag Roar. (2024) A new insulin mixture could make life easier for patients with type 1 diabetes. Norwegian SciTech News Norwegian SciTech News [Journal] 04.01.2024
-
InterviewNormannsen, Sølvi Waterloo; Carlsen, Sven Magnus; Berg, Hilde Kjeldstad; Stavdahl, Øyvind; Ellingsen, Reinold; Hjelme, Dag Roar. (2024) Ny insulin-miks kan gi pasienter med diabetes type 1 et lettere liv. Gemini Gemini [Journal] 04.01.2024
-
Academic lectureVaskinn, Kristina Skarvang; Elson, Daniel J.; Beppu, Shohei; Soma, Daiki; Bjørnstad, Steinar; Hjelme, Dag Roar. (2024) Earthquake Detection using State-of-Polarisation Sensing on Aerial Cable. 50th European Conference on Optical Communication (ECOC 2024) , Frankfurt 22.09.2024 - 26.09.2024
-
Academic lectureVaskinn, Kristina Skarvang; Bjørnstad, Steinar; Sæthre, Erik; Hjelme, Dag Roar. (2024) Local Wind Impact Sensing using State of Polarization Measurement on a Live Short-Haul Aerial Fibre Cable. 2024 Optical Fiber Communications Conference and Exhibition (OFC) , San Diego, CA 24.03.2024 - 28.03.2024
-
InterviewCarlsen, Sven Magnus; Berg, Hilde Kjeldstad; Stavdahl, Øyvind; Ellingsen, Reinold; Hjelme, Dag Roar; Christiansen, Sverre Christian. (2024) New formulation of insulin may speed up its action for people with type 1 diabetes. Breakthrough T1D Research News Breakthrough T1D Research News [Internet] 25.03.2024
2023
-
Academic lectureUrban, David; Hjelme, Dag Roar; Descrovi, Emiliano. (2023) Polarization-driven reversible deformation in an azopolymer-elastomer composite. 4th International Conference on Photoalignment and Photopatterning in Soft Materials , St. Petersburg, Florida 10.12.2023 - 16.12.2023
-
LectureSkarvang, Kristina Shizuka Yamase; Bjørnstad, Steinar; Rørstadbotnen, Robin Andre; Bozorgebrahimi, Kurosh; Brenne, Jan Kristoffer; Hjelme, Dag Roar. (2023) Comparing Sensitivity of State Of Polarization Monitoring and Distributed Acoustic Sensing in the Svalbard Arctic Submarine Communication Cable. SubOptic 2023 , Bangkok 13.03.2023 - 16.03.2023
-
LectureSkarvang, Kristina Shizuka Yamase; Bjørnstad, Steinar; Rørstadbotnen, Robin Andre; Bozorgebrahimi, Kurosh; Hjelme, Dag Roar. (2023) Observation of Local Small Magnitude Earthquakes using State Of Polarization Monitoring in a 250km Passive Arctic Submarine Communication Cable. 2023 Optical Fiber Communications Conference and Exhibition (OFC) , San Diego, CA 05.03.2023 - 09.03.2023
-
LectureSkarvang, Kristina Shizuka Yamase; Bjørnstad, Steinar; Hjelme, Dag Roar. (2023) A Practical Approach to Vibration Monitoring on a Metro Length Fiber Cable Using Low-Cost State of Polarization Monitoring. 2023 IEEE Photonics Society Summer Tropicals Meeting Series (SUM) , Sicily 17.07.2023 - 19.07.2023
-
Academic lectureUrban, David; Hjelme, Dag Roar; Descrovi, Emiliano. (2023) Light-responsive azopolymer-based metamaterials as locally, anisotropically, and reversibly stretchable polymer substrates. European Materials Research Society (EMRS) Spring Meeting 2023 , Strasbourg 29.05.2023 - 02.06.2023
-
Academic lectureUrban, David; Hjelme, Dag Roar; Descrovi, Emiliano. (2023) Polarization-driven reversible deformation in a light-responsive amorphous polymer blend. CLEO Europe/Europe-EQEC , München 26.06.2023 - 30.06.2023
2022
-
Academic lectureGrayson, Michael; Krueper, Greg; Xu, Bo; Hjelme, Dag Roar; Gopinath, Juliet; Park, Wounjhang. (2022) GeSbSe Devices for Mid-Infrared Optical Sensing. Optical Sensors 2022 , Vancouver, British Columbia 11.07.2022 - 15.07.2022
-
Academic lectureWahl, Markus Solberg; Boucher, Susanne Aspen; Lamb, Jacob Joseph; Sundby, Eirik; Thomas, Peter James; Hjelme, Dag Roar. (2022) Towards in-situ state of health monitoring of lithium-ion batteries using internal fiber-optic sensors. 241st ECS Meeting , Vancouver, Canada 29.05.2022 - 02.06.2022
-
Academic lectureUrban, David; Hjelme, Dag Roar; Descrovi, Emiliano. (2022) Polarized light guiding anisotropic deformation and relaxation in photosensitive polymeric substrates. EOS Annual Meeting 2022 , Porto 12.09.2022 - 16.09.2022
2021
-
Academic lectureFuglerud, Silje Skeide; Hjelme, Dag Roar. (2021) Reducing the SNR for Fiber-Coupled Supercontinuum Absorption Spectroscopy Applied to Glucose Sensing. LC week: IR News Flash , Online 06.12.2021 - 09.12.2021
-
PosterFuglerud, Silje Skeide; Ellingsen, Reinold; Aksnes, Astrid; Hjelme, Dag Roar. (2021) Interfering substances for glucose sensing by near-infrared spectroscopy. ATTD , Digital 02.06.2021 - 05.06.2021
-
Academic lectureFuglerud, Silje Skeide; Hjelme, Dag Roar. (2021) Towards Remote Fiber-Based In Vivo Sensing of Glucose by Near Infrared Spectroscopy. OSA Optical Sensors and Sensing Congress , Online 19.07.2021 - 21.07.2021
-
PosterMuri, Harald Ian; Hjelme, Dag Roar. (2021) Classification of municipal solid waste using deep convolutional neural network model applied to multispectral images. SPIE Optical Metrology , Munchen 21.06.2021 - 25.06.2021
-
Academic lectureFuglerud, Silje Skeide; Hjelme, Dag Roar. (2021) Fiber-based glucose sensing for an artificial pancreas. LC talks 2nd infrared sessions 19.01.2021 -
2020
-
Academic lectureJernelv, Ine Larsen; Høvik, Jens; Hjelme, Dag Roar; Aksnes, Astrid. (2020) Signal enhancement in microstructured silicon attenuated total reflection elements with quantum cascade laser-based spectroscopy. Photonics Europe 06.04.2020 - 10.04.2020
-
Academic lectureYadav, Mukesh; Noh, Jong Wook; Hjelme, Dag Roar; Aksnes, Astrid. (2020) Hybrid ring resonator sensor with high quality factor and wide dynamic range. OSA Optical Sensors and Sensing Congress , Digital 22.06.2020 - 26.06.2020
-
Academic lectureJernelv, Ine Larsen; Strøm, Karina; Hjelme, Dag Roar; Aksnes, Astrid. (2020) Mid-infrared spectroscopy with a fiber-coupled tuneable quantum cascade laser for glucose sensing. Photonics West , San Francisco 01.02.2020 - 06.02.2020
2019
-
PosterFougner, Anders Lyngvi; Åm, Marte Kierulf; Bösch, Patrick Christian; Christiansen, Sverre; Ellingsen, Reinold; Hjelme, Dag Roar. (2019) Why intraperitoneal glucose sensing is sometimes surprisingly rapid and sometimes slow: A hypothesis. Advanced Technologies & Treatments for Diabetes (ATTD) , Berlin 20.02.2019 - 23.02.2019
-
Academic lectureJernelv, Ine Larsen; Hjelme, Dag Roar; Ellingsen, Reinold; Aksnes, Astrid. (2019) Quantum Cascade Lasers in Biomedicine and Nanotechnology. Nano-Network Workshop , Tromsø 17.06.2019 - 19.06.2019
-
LectureOsinski, Dominik; Bizon, Patrycja; Midtfjord, Helene B.; Wierzchon, Michal; Hjelme, Dag Roar. (2019) Designing Auditory Color Space for Color Sonification Systems. The 25th International Conference on Auditory Display (ICAD 2019) , Newcastle 23.06.2019 - 27.06.2019
-
Academic lectureFuglerud, Silje Skeide; Milenko, Karolina Barbara; Ellingsen, Reinold; Aksnes, Astrid; Martens, Harald Aagaard; Hjelme, Dag Roar. (2019) Aqueous glucose sensing by fiber-based near-infrared spectroscopy. Scandinavian symposium on Chemometrics 16 , Oslo 17.06.2019 - 20.06.2019
-
PosterYadav, Mukesh; Høvik, Jens; Noh, Jong Wook; Hjelme, Dag Roar; Aksnes, Astrid. (2019) Silicon photonic waveguide sensor. Norwegian Nano Symposium 2019 , Trondheim 16.10.2019 - 17.10.2019
-
Academic lectureFuglerud, Silje Skeide; Milenko, Karolina Barbara; Ellingsen, Reinold; Aksnes, Astrid; Hjelme, Dag Roar. (2019) Feasibility of supercontinuum sources for use in glucose sensing by absorption spectroscopy. European Conferences on Biomedical Optics , Munchen 23.06.2019 - 27.06.2019
-
Academic lectureAksnes, Astrid; Høvik, Jens; Yadav, Mukesh; Noh, Jong Wook; Hjelme, Dag Roar; Milenko, Karolina Barbara. (2019) Photonics activities at IES: LOC biosensor project and Artificial intraperitoneal pancreas project. Seminar at UiT , Tromsø 05.09.2019 - 05.09.2019
-
PosterAksnes, Astrid; Høvik, Jens; Yadav, Mukesh; Noh, Jong Wook; Arnfinnsdottir, Nina Bjørk; Øvreeide, Ingrid Haga. (2019) Lab-on-a-chip platform for early detection of disease biomarkers. Digital Life 2019 , Clarion Hotel Edge, Tromsø 05.09.2019 - 06.09.2019
2018
-
PosterYadav, Mukesh; Høvik, Jens; Hjelme, Dag Roar; Aksnes, Astrid. (2018) Sensitivity enhanced biophotonic sensor utilizing sub-wavelength gratings. SPIE International Symposium on Optics + Photonics 2018 , San Diego, California, USA 19.08.2018 - 23.08.2018
-
Academic lectureHammarling, Krister; Muri, Harald Ian; Wahl, Markus Solberg; Engholm, Magnus; Hjelme, Dag Roar. (2018) A combined glucose and pH sensor on a single optical fiber for continuous point-of-care testing. Proceedings of SPIE, the International Society for Optical Engineering 2018 ;Volum 10488 27.01.2018 - 01.02.2018
-
LectureBurheim, Odne Stokke; Lien, Kristian Myklebust; Hjelme, Dag Roar. (2018) ENERSENSE - Energy Nexus of Efficiency, Storage, and Sensor. H2FC2018 , Trondheim 14.05.2018 - 15.05.2018
-
Academic lectureFuglerud, Silje Skeide; Milenko, Karolina Barbara; Jernelv, Ine Larsen; Ellingsen, Reinold; Aksnes, Astrid; Hjelme, Dag Roar. (2018) A miniaturized ball-lensed fiber optic NIR transmission spectroscopy-based glucose sensor. OSA Advanced Photonics Congress , Zürich 02.07.2018 - 05.07.2018
-
Academic lectureOsinski, Dominik; Hjelme, Dag Roar. (2018) A sensory substitution device inspired by the human visual system. 11th International Conference on Human System Interaction HSI 2018 04.07.2018 - 06.07.2018
-
PosterMilenko, Karolina Barbara; Jernelv, Ine Larsen; Fuglerud, Silje Skeide; Aksnes, Astrid; Ellingsen, Reinold; Hjelme, Dag Roar. (2018) Glucose monitoring with optical fiber based Raman spectroscopy. Norwegian Electro-Optics Meeting 02.05.2018 - 04.05.2018
-
Academic lectureJernelv, Ine Larsen; Milenko, Karolina Barbara; Ellingsen, Reinold; Hjelme, Dag Roar; Aksnes, Astrid. (2018) Developing a Mid-Infrared Spectroscopy System for Biomedical Sensing. Norwegian Electro-Optics Meeting , Henningsvær 02.05.2018 - 04.05.2018
-
PosterJernelv, Ine Larsen; Milenko, Karolina Barbara; Ellingsen, Reinold; Hjelme, Dag Roar; Aksnes, Astrid. (2018) Improving Multivariate Analysis in Mid-Infrared Spectroscopy for Biosensing. Advanced Photonics Congress , Zürich 02.07.2018 - 05.07.2018
-
Academic lectureWahl, Markus Solberg; Wilhelmsen, Øivind; Hjelme, Dag Roar. (2018) A Combined Temperature Sensor and Phase Transition Detection Probe on a Single Optical Fiber. 20th Symposium on Thermophysical Properties , Boulder 24.06.2018 - 29.06.2018
-
PosterBösch, Patrick Christian; Fougner, Anders Lyngvi; Ellingsen, Reinold; Hjelme, Dag Roar; Stavdahl, Øyvind. (2018) Test-rig for Automated Testing of Continuous Glucose Sensor Prototypes. Advanced Technologies & Treatments for Diabetes (ATTD) , Vienna 14.02.2018 - 17.02.2018
-
PosterWahl, Markus Solberg; Wilhelmsen, Øivind; Hjelme, Dag Roar. (2018) Combined temperature and RI sensor for exploring the phase transitions of ethanol solutions. OFS26 , Lausanne 24.09.2018 - 28.09.2018
-
PosterMilenko, Karolina Barbara; Jernelv, Ine Larsen; Fuglerud, Silje Skeide; Aksnes, Astrid; Ellingsen, Reinold; Hjelme, Dag Roar. (2018) Towards Fiber-Optic Raman Spectroscopy for Glucose Sensing. OSA Advanced Photonics Congress , Zurich 02.07.2018 - 05.07.2018
-
Academic lectureHjelme, Dag Roar. (2018) SP2 - Sensor development. KPN WtE 2030 seminar, workshop & SC , Renovasjonsetaten, Oslo 30.10.2018 - 31.10.2018
2017
-
LectureMilenko, Karolina Barbara; Jernelv, Ine Larsen; Aksnes, Astrid; Ellingsen, Reinold; Carlsen, Sven Magnus; Hjelme, Dag Roar. (2017) Optical Fiber Probe based on Raman Spectroscopy for Continuous Glucose Monitoring. 9th International Conference on Advanced Vibrational Spectroscopy , Victoria BC 11.06.2017 - 16.06.2017
-
PosterMilenko, Karolina Barbara; Jernelv, Ine Larsen; Aksnes, Astrid; Ellingsen, Reinold; Carlsen, Sven Magnus; Hjelme, Dag Roar. (2017) Raman spectroscopy for continuous glucose monitoring. Digital Life 2017 , Oslo 20.03.2017 -
-
PosterSarker, Shiplu; Lamb, Jacob Joseph; Lien, Kristian Myklebust; Hjelme, Dag Roar. (2017) Anaerobic digestion system for bio-CH4 and bio-H2 production utilizing fish waste in Norway: A comparison between a single stage and two stage reactor process. European biomass conference and exhibition 2017 , Stockholm 12.06.2017 - 15.06.2017
-
PosterLamb, Jacob Joseph; Sarker, Shiplu; Lien, Kristian Myklebust; Hjelme, Dag Roar. (2017) On-line monitoring of volatile fatty acids and hydrogen during anaerobic digestion. 3rd Conference on Monitoring & Process Control of Anaerobic Digestion Plants 29.03.2017 - 30.03.2017
-
PosterHjelme, Dag Roar; Muri, Harald Ian DI. (2017) First step towards an interferometric and localized surface plasmon fiber optic sensor. Optical Fiber Sensors Conference (OFS), 2017 25th 24.04.2017 - 28.04.2017
-
PosterHammarling, Krister; Muri, Harald Ian DI; Wahl, Markus Solberg; Engholm, Magnus; Hjelme, Dag Roar. (2017) Dual Parameter Fiber Optic Sensor Combining a Fabry-Perot and a Mach-Zehnder Interferometer. IEEE Sensors 2017 , Glasgow 29.10.2017 - 01.11.2017
-
Academic lectureHjelme, Dag Roar. (2017) A Lower Bound on the Resolution Limit of Resonant Refractive Index Sensors. Advanced Photonics 2017 , New Orleans 24.07.2017 - 27.07.2017
-
PosterBösch, Patrick Christian; Åm, Marte Kierulf; Stavdahl, Øyvind; Fougner, Anders Lyngvi; Carlsen, Sven Magnus; Ellingsen, Reinold. (2017) Set-up and procedure for intraperitoneal glucose monitoring in anaesthetised animals. Advanced Technologies & Treatments for Diabetes (ATTD) , Paris 15.02.2017 - 18.02.2017
-
PosterJernelv, Ine Larsen; Milenko, Karolina Barbara; Hjelme, Dag Roar; Ellingsen, Reinold; Carlsen, Sven Magnus; Aksnes, Astrid. (2017) Optimising Multivariate Models for Glucose Measurements in an ATR-FTIR Spectrometer. ICAVS9 , Victoria 11.06.2017 - 16.06.2017
-
PosterJernelv, Ine Larsen; Milenko, Karolina Barbara; Carlsen, Sven Magnus; Ellingsen, Reinold; Hjelme, Dag Roar; Aksnes, Astrid. (2017) Quantitative Measurements of Glucose Solutions Using Mid-Infrared Spectroscopy. Digital Life 2017 , Oslo 20.03.2017 - 21.03.2017
-
PosterÅm, Marte Kierulf; Fougner, Anders Lyngvi; Bösch, Patrick Christian; Dirnena-Fusini, Ilze; Kölle, Konstanze; Stavdahl, Øyvind. (2017) Intraperitoneal glucose measuring using amperometric glucose sensors and intraperitoneal fluid samples in an animal model. Advanced Technologies & Treatments for Diabetes (ATTD) , Paris 15.02.2017 - 18.02.2017
2016
-
Academic lectureMuri, Harald Ian; Hjelme, Dag Roar. (2016) Reflection based nanoplasmonic fiber optic sensor. Norwegian electro-optics meeting 2016 13.04.2016 - 15.04.2016
2015
-
Academic lectureHjelme, Dag Roar; Strømstad, Håkon. (2015) Low-cost high performance readout system for fiber-optic biosensors. Photonic West BIOS , San Francisco 07.02.2015 - 12.02.2015
-
Programme participation
-
LectureHjelme, Dag Roar. (2015) Komponenter for optiske nettverk. Fiberoptikk 2015 , Trondheim 02.11.2015 - 03.11.2015
-
Academic lectureHjelme, Dag Roar. (2015) Lab-on-a-chip biophotonic sensor platform for diagnostics. NTNU Bioinformatics Network Seminar 2015 , Trondheim 14.12.2015 - 14.12.2015
2014
-
Academic lectureHjelme, Dag Roar; Aune, Oddvar; Falch, Berit H.; Østling, Dan; Ellingsen, Reinold. (2014) Fiber-Optic Biosensor Technology for Rapid, Accurate and Specific Detection of Enzymes. Advanced Photonics , Barcelona 27.07.2014 - 31.07.2014
2011
-
PosterKimsas, Andreas; Bjørnstad, Steinar; Stol, Norvald; Hjelme, Dag Roar. (2011) AWGshare - a Highly Scalable and Strictly Non-Blocking Optical Switch. 15th International Conference on Optical Network Design and Modeling (ONDM 2011) , Bologna 07.02.2011 - 10.02.2011
2010
-
Academic lectureHjelme, Dag Roar. (2010) An Optical Biosensor Technology For Clinical Diagnostics And Monitoring. Norwegian Electro-Optics Meeting , Ålesund 07.04.2010 - 09.04.2010
2009
-
Academic lectureTierney, Sven; Hjelme, DR; Stokke, Bjørn Torger. (2009) Application of a high resolution interferometric fiber-optic technology platform for development of (bio)polymer hydrogels as signal transducers in biosensing. 3rd NANOMAT Conference , Lillehammer 14.06.2009 - 16.06.2009
2008
-
Academic lectureTierney, Sven; Hjelme, DR; Stokke, Bjørn Torger. (2008) Glucose responsive hydrogels measured by a novel optical technique. Polymer Networks 2008, 19th Polymer Networks Group Conference , Larnaca 22.06.2008 - 26.06.2008
2007
-
Academic lectureBjørnstad, Steinar; Nord, Martin; Eriksen, Lars Erik; Tuft, Vegard Larsen; Hjelme, Dag Roar; Stol, Norvald. (2007) Demonstration and analysis of TV- and data transport in the OpMiGua hybrid circuit/packet switched network testbed. 33rd European Conference and Exhibition on Optical Communication Conference , Berlin 17.09.2007 - 19.09.2007
-
Academic lectureBjørnstad, Steinar; Nord, Martin; Eriksen, Lars Erik; Tuft, Vegard; Hjelme, Dag Roar; Stol, Norvald. (2007) Demonstration and analysis of TV- and data transport in the OpMiGua hybrid circuit/packet switched network testbed. ,” European Conference on Optical Communication (ECOC 2007), Session 4.6, September 16 - 20, 2007, , Berlin, Germany 18.09.2007 - 20.09.2007
-
Academic lectureTierney, Sven; Stokke, Bjørn Torger; Hjelme, Dag Roar. (2007) Polymer Gel Transducers as an Interface for Optical Detection of Biological Molecules. MRS fall meeting 2007, symposium LL: Bioinspired Polymer Gels and Networks , Boston 26.11.2007 - 29.11.2007
-
PosterLarsen, Eivind La Puebla; Randeberg, Lise Lyngsnes; Gederaas, Odrun Arna; Krokan, Hans Einar; Hjelme, Dag Roar; Svaasand, Lars O.. (2007) In vitro study on methemoglobin formation in erythrocytes following hexyl-aminolevulinate induced photodynamic therapy. SPIE Photonics West 2007: Biomedical Optics (BiOS) , San Jose 20.01.2007 - 25.01.2007
2006
-
Academic lectureLarsen, Eivind La Puebla; Randeberg, Lise Lyngsnes; Gederaas, Odrun Arna; Arum, Carl-Jørgen; Krokan, Hans Einar; Hjelme, Dag Roar. (2006) Monitoring of hALA induced PDT in rat bladder cancer by optical spectroscopy. Twenty-Sixth Annual Meeting , Boston, Massachusetts 05.04.2006 - 09.04.2006
-
Academic lectureTuft, Vegard Larsen; Hjelme, Dag Roar. (2006) The Effect of PDL in a Polarization and Time Division Multiplexed Scheme for All-Optical Class of Service Segregation. 8th International Conference on Transparent Optical Networks (ICTON 2006) , Nottingham 19.06.2006 - 22.06.2006
-
Academic lectureBjørnstad, Steinar; Eriksen, Lars Erik; Hjelme, Dag Roar. (2006) The OpMiGua multiservice optical hybrid packet/circuit switched network supporting TV-broadcasting QoS requirements. ICTON 2006 , Nottingham 18.06.2006 - 22.06.2006
-
PosterTuft, Vegard Larsen; Bjørnstad, Steinar; Sudbø, Aasmund; Hjelme, Dag Roar. (2006) Using the State of Polarization in a Hybrid Optical Network. Northern Optics 2006 , Bergen 14.06.2006 - 16.06.2006
-
PosterBjørnstad, Steinar; Nord, Martin; Tuft, Vegard Larsen; Austad, Oddgeir; Hjelme, Dag Roar; Eriksen, Lars Erik. (2006) Experimental Demonstration of OpMiGua Hybrid Circuit/Packet Nodes. 32nd European Conference on Optical Communication (ECOC) 2006 , Cannes 24.09.2006 - 28.09.2006
-
PosterTuft, Vegard Larsen; Buron, Jakob; Hjelme, Dag Roar; Bjørnstad, Steinar. (2006) Demonstration of an All-Optical Class-of-Service Segregation Method for Edge Nodes in Hybrid Circuit/Packet Switched Networks. 32nd European Conference on Optical Communication (ECOC) 2006 , Cannes 24.09.2006 - 28.09.2006
-
PosterTierney, Sven; Stokke, Bjørn Torger; Hjelme, Dag Roar; Sundan, Anders. (2006) Polymer gel transducers as an interface for optical detection of biological macromolecules. Biofysikermøtet 2006 , Kongsvold Fjeldstue 15.03.2006 - 17.03.2006
-
PosterLarsen, Eivind La Puebla; Randeberg, Lise Lyngsnes; Hjelme, Dag Roar; Svaasand, Lars O.. (2006) Fiber probe for in vivo Optical Spectroscopy during Photodynamic Therapy. Northern Optics , Bergen 14.06.2006 - 16.06.2006
-
PosterTuft, Vegard; Bjørnstad, Steinar; Sudbø, Aasmund Sveinung; Hjelme, Dag Roar. (2006) Using the state of polarization in a hybrid optical network, paper W46 at the conference ‘,’ 14-16 June 2006,. Northern Optics 2006 , Radisson SAS Hotel Norge, Bergen 14.06.2006 - 16.06.2006
2005
-
Academic lectureTuft, Vegard Larsen; Bjørnstad, Steinar; Hjelme, Dag Roar. (2005) Time Interleaved Polarization Multiplexing for Polarization Labelling. 7th International Conference on Transparent Optical Networks , Barcelona 03.07.2005 - 07.07.2005
2004
-
Academic lectureBjørnstad, Steinar; Hjelme, Dag Roar; Stol, Norvald. (2004) Asynchronous feedback buffer with reduced self induced contention for optical packet switches. Optoelectronics and communication conference/International conference on optical Internet , Yokohama 12.07.2004 - 16.07.2004
-
PosterDyrseth, Astrid Aksnes; Engan, Helge Emil; Hjelme, Dag Roar. (2004) Optical detection of ultrasound and optical spectroscopy for detection of vulnerable plaques. Norwegian Electro-Optics meeting , Tønsberg 02.05.2004 - 04.05.2004
-
Academic lectureBjørnstad, Steinar; Hjelme, Dag Roar; Stol, Norvald; Nord, Martin. (2004) A packet switched hybrid optical network with service guarantees. Norsk elektro-optikk møte , Tønsberg 02.05.2004 - 04.05.2004
-
Academic lectureVignes, Bendik; Chizhov, Mikhail; Makarov, Vadim; Dyrseth, Astrid Aksnes; Hjelme, Dag Roar. (2004) Faked sates attack on quantum cryptosystems. Norwegian Electro-Optics Meeting 2004 , Tønsberg 02.05.2004 - 04.05.2004
2003
-
Academic lectureBjørnstad, Steinar; Nord, Martin; Hjelme, Dag Roar. (2003) QoS differentiation and header/payload separation in optical packet switching using polarisation multiplexing. European Conference on Optical Communication , Rimini 21.09.2003 - 25.09.2003
-
Academic lectureBjørnstad, Steinar; Hjelme, Dag Roar; Stol, Norvald. (2003) A highly efficient optical packet switching node design supporting guaranteed service. European Conference on Optical Communication , Rimini 21.09.2003 - 25.09.2003
2002
-
PosterMakarov, Vadim; Hjelme, Dag Roar. (2002) Practical quantum cryptography. Norwegian Electro-Optics Meeting 2002 , Flåm 05.05.2002 -
-
Academic lectureBjørnstad, Steinar; Stol, Norvald; Hjelme, Dag Roar. (2002) Quality of service in optical packet switched DWDM transport networks. Asia Pacific Optical and Wireless Communications conference and exibition 2002 (APOC 2002, SPIE Conference) , Shanghai, China 16.10.2002 -
-
Academic lectureBjørnstad, Steinar; Hjelme, Dag Roar; Stol, Norvald. (2002) An optical packet switch design with shared electronic buffering and low bit rate add/drop inputs. ICTCON'2002 , Warsawa, Poland 22.04.2002 -
-
Academic lectureBjørnstad, Steinar; Nord, Martin; Hjelme, Dag Roar. (2002) Transparent optical protection switching scheme based on detection of polarisation fluctuations. OFC2002 Optical Fiber Communication conference , Anaheim, California, USA 21.03.2002 -
-
Academic lectureBjørnstad, Steinar; Hjelme, Dag Roar; Stol, Norvald. (2002) A scalable optical packet switch for variable length packets employing share electronic buffering. ECOC2002 European Conference on Optical Communications , Copenhagen, Denmark 11.09.2002 -
-
Academic lectureMakarov, Vadim; Hjelme, Dag Roar. (2002) Quantum cryptography. Norsk kryptoseminar 2002 , Trondheim 18.10.2002 -
2001
-
Academic lectureBjørnstad, Steinar; Nord, Martin; Hanssen, Geir; Slagsvold, Bjørn; Hjelme, Dag Roar. (2001) Impact of Four-Wave-Mixing in polarization multiplexed 12.5 GHz channel spacing WDM systems. LEOS 2001 , San Diego, California, USA 15.11.2001 -
-
PosterMakarov, Vadim; Hjelme, Dag Roar. (2001) High-Speed Quantum Key Distribution Experiment. QUICK: Quantum interference and cryptographic keys: novel physics and advancing technologies , Cargese, Corsica, France 13.04.2001 -
1998
-
Academic lectureHjelme, Dag Roar; Storøy, Helge; Skaar, Johannes. (1998) Reconfigurable all-fiber cross-connect node using synthesized fiber Bragg gratings for both demultiplexing and switching. Optical Fiber Communication Conference OFC'98 , San Jose, California