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Effects of pre-strain on the intrinsic pressure sensitivity of polymer optical fiber Bragg gratings
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Paper 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.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103234U (23 April 2017); doi: 10.1117/12.2265885
Show Author Affiliations
Jens Kristian Mølgaard Pedersen, Technical Univ. of Denmark (Denmark)
Getinet Woyessa, Technical Univ. of Denmark (Denmark)
Kristian Nielsen, Technical Univ. of Denmark (Denmark)
Ole Bang, Technical Univ. of Denmark (Denmark)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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