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Q: Fachverband Quantenoptik und Photonik
Q 42: Laser and Laser Applications
Q 42.5: Poster
Mittwoch, 16. März 2022, 16:30–18:30, P
Novel Approches in Distributed Raman Temperature Sensing — •Esther Renner1,2, Lisa-Sophie Haerteis1,2, and Bernhard Schmauss1,2 — 1Institute of Microwaves and Photonics, Friedrich-Alexander University Erlangen-Nürnberg — 2Max Planck School of Photonics
Fiber optical sensors for temperature or strain sensing offer unique advantages compared to common electrical sensors, e.g. immunity to electromagnetic fields, (durability in rough environments and) chemical inertness and coverage of both, long sensing distances and multiple sensing points. Well known fiber sensors for temperature sensing are Fiber Bragg Gratings (FBG), used to determine temperatures at distinctive points of interest along the fiber. To obtain a distributed temperature measurement along the whole fiber, FBG interrogation can be combined with the detection of the temperature dependent spontaneous Raman backscattering [1].
Besides interrogation based on optical time domain reflectometry, spatial resolution can be obtained by incoherent optical frequency domain reflectometry (IOFDR). Here, we present two cost-efficient novel approaches for the integration of distributed Raman temperature sensing in a simple IOFDR system for FBG interrogation [2] using first, a broadband light source and second, a L-band pump laser diode.
[1] Koeppel, M. et al., J. Sens. Sens. Syst., 7, 91-100, 2018.
[2] Haerteis, L. et al., in OSA Optical Sensors and Sensing Congress 2021, paper SM5A.7.