High-sensitivity stress sensor based on Bragg grating in BDK-doped photosensitive polymer optical fiber

Tongxin Wang; Yanhua Luo; Gang-Ding Peng; Qijin Zhang

doi:10.1117/12.912737

30 January 2012 High-sensitivity stress sensor based on Bragg grating in BDK-doped photosensitive polymer optical fiber

Tongxin Wang, Yanhua Luo, Gang-Ding Peng, Qijin Zhang

Proceedings Volume 8351, Third Asia Pacific Optical Sensors Conference; 83510M (2012) https://doi.org/10.1117/12.912737
Event: Asia Pacific Optical Sensors Conference, 2012, Sydney, Australia

Abstract

Bragg grating in a single-mode photosensitive polymer optical fiber (POF) with benzil dimethyl ketal (BDK)-doped in core has been inscribed through the Sagnac ring interference method. The Bragg wavelength of grating is about 1570nm. The stress and strain response of fiber Bragg grating (FBG) has been studied respectively. By fitting the experimental result, the strain sensitivity of FBG in POF has been found to be almost same to that of conventional silica fiber Bragg gratings. However, the stress sensitivity of FBG in POF is measured to be 421pm/MPa, which is 28 times higher than FBG in silica fiber. And such high stress sensitivity makes Bragg grating in a single-mode BDK-doped POF appear to be very attractive for constructing stress sensor with high resolution.

Citation Download Citation

Tongxin Wang, Yanhua Luo, Gang-Ding Peng, and Qijin Zhang "High-sensitivity stress sensor based on Bragg grating in BDK-doped photosensitive polymer optical fiber", Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83510M (30 January 2012); https://doi.org/10.1117/12.912737

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