Blar i Fakultet for informasjonsteknologi og elektroteknikk (IE) på forfatter "Wahl, Markus Solberg"
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Addressing Challenges in Fabricating Reflection-2 Based Fiber Optic Interferometers
Wahl, Markus Solberg; Wilhelmsen, Øivind; Hjelme, Dag Roar (Journal article; Peer reviewed, 2019)abrication of multimode fiber optic interferometers requires accurate control of certain parameters to obtain reproducible results. This paper evaluates the consequences of practical challenges in fabricating reflection-based, ... -
Combined temperature and RI sensor for exploring the phase transitions of ethanol solutions
Wahl, Markus Solberg; Wilhelmsen, Øivind; Hjelme, Dag Roar (Chapter, 2018)A fiber optic interferometer based on core diameter mismatch is used in reflection mode to study the behavior of ethanol solutions with regards to concentration dependent thermal properties and phase transitions. A method ... -
Detection and analysis of liquid-solid phase transitions with fiber-optic sensors
Wahl, Markus Solberg (Doctoral theses at NTNU;2020:163, Doctoral thesis, 2020)Fiber-optic sensors offer unique benefits within the field of experimental thermodynamics due to their small size and inert all-fiber design. Interrogation of the reflected signal enables insertion probes able to monitor ... -
Dual parameter fiber optic sensor combining a Fabry-Perot and a Mach-Zehnder interferometer
Hammarling, Krister; Wahl, Markus Solberg; Muri, Harald Ian; Engholm, Magnus; Hjelme, Dag Roar (Journal article, 2017)A new concept for dual parameter fiber optic sensor has been developed and characterized, both in a two-fiber and single-fiber configuration. The liquid sensor measures ethanol concentration with a stimuli responsive ... -
Ice formation and growth in supercooled water–alcohol mixtures: Theory and experiments with dual fiber sensors
Wahl, Markus Solberg; Aasen, Ailo; Hjelme, Dag Roar; Wilhelmsen, Øivind (Peer reviewed; Journal article, 2020)Increased knowledge on fluid-solid phase transitions is needed, both when they are undesired and can impair processes operation, and when strict control is required in fields such as food technology, the pharmaceutical ... -
The Importance of Optical Fibres for Internal Temperature Sensing in Lithium-ion Batteries during Operation
Wahl, Markus Solberg; Spitthoff, Lena; Muri, Harald Ian; Jinasena, Asanthi; Burheim, Odne Stokke; Lamb, Jacob Joseph (Journal article; Peer reviewed, 2021) -
Micro-Photoluminescence Spectroscopy of Au-assisted MBE Grown AlGaAs Nanowires with Axial GaAs Inserts
Wahl, Markus Solberg (Master thesis, 2012)AlGaAs nanowires (NWs) with axial GaAs inserts, grown with molecular beam epitaxy will be investigated with micro-photoluminescence spectroscopy, including CW and pulsed excitation at cryogenic and ambient temperatures. -
Thermal transport in lithium-ion batteries: The effect of degradation
Spitthoff, Lena; Wahl, Markus Solberg; Vie, Preben Joakim Svela; Burheim, Odne Stokke (Peer reviewed; Journal article, 2023)In this work, we report thermal conductivities of pristine and degraded electrodes, from commercial lithium-ion batteries. The thermal conductivities were measured with and without electrolyte solvent and at different ... -
Using Fiber-Optic Sensors to Give Insight into Liquid-Solid Phase Transitions in Pure Fluids and Mixtures
Wahl, Markus Solberg; Wilhelmsen, Øivind; Hjelme, Dag Roar (Peer reviewed; Journal article, 2020)Fiber optic sensors offer a new and unique way to detect and analyze phase transitions, due to their small thermal mass and inert material. This paper presents and demonstrates a dual-sensor system to detect and analyze ...