23 April 2017 Effects of pre-strain on the intrinsic pressure sensitivity of polymer optical fiber Bragg gratings
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Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103234U (2017) https://doi.org/10.1117/12.2265885
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of
Abstract
We experimentally demonstrate a scheme for improving the intrinsic pressure sensitivity of fiber Bragg-gratings (FBGs) inscribed in polymer optical fibers by applying pre-strain in order to suppress the pressure induced mechanical contraction of the fiber. This contraction would otherwise contribute to a blueshift of the Brag-wavelength, counteracting the dominant redshift caused by the stress-optic effect, which effectively reduces the pressure sensitivity of the FBG. By applying this technique we are able to improve the sensitivity of the FBG from 2.8 pm/bar to 7.3 pm/bar.
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Jens Kristian Mølgaard Pedersen, Getinet Woyessa, Kristian Nielsen, Ole Bang, "Effects of pre-strain on the intrinsic pressure sensitivity of polymer optical fiber Bragg gratings", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103234U (23 April 2017); doi: 10.1117/12.2265885; https://doi.org/10.1117/12.2265885
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