2 June 2014 Highly sensitive operation of intensity-based fiber-optic vibration sensor using cascaded long period fiber grating
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Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91571H (2014) https://doi.org/10.1117/12.2059466
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain
Abstract
A highly sensitive fiber-optic mechanical vibration sensor is constructed by using a cascaded long period fiber grating (LPG) based on an intensity modulation scheme. In the fabrication process, the cascaded LPG, which is composed of a pair of identical LPGs with a certain distance, is inscribed in a length of photosensitive single-mode optical fiber by means of a point-by-point technique using a KrF excimer laser. Since the sensitivity of the intensity-based LPG sensor depends on a gradient of the slope of transmittance spectrum curve as well as the strain-sensitivity of the spectral shift, the channeled spectrum of the cascaded LPG provides a highly sensitive operation for the vibration detection. In the experiment, several kinds of cascaded LPGs have been fabricated and examined in terms of the sensor sensitivity. In addition, highly sensitive mechanical vibration detection has been successfully demonstrated.
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Satoshi Tanaka, Satoshi Tanaka, Osamu Tsukida, Osamu Tsukida, Makoto Takeuchi, Makoto Takeuchi, Shingo Tekuramori, Shingo Tekuramori, Ryotaro Uchimura, Ryotaro Uchimura, Atsushi Wada, Atsushi Wada, Nobuaki Takahashi, Nobuaki Takahashi, } "Highly sensitive operation of intensity-based fiber-optic vibration sensor using cascaded long period fiber grating", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91571H (2 June 2014); doi: 10.1117/12.2059466; https://doi.org/10.1117/12.2059466
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