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Proceedings Paper

Highly sensitive operation of intensity-based fiber-optic vibration sensor using cascaded long period fiber grating
Author(s): Satoshi Tanaka; Osamu Tsukida; Makoto Takeuchi; Shingo Tekuramori; Ryotaro Uchimura; Atsushi Wada; Nobuaki Takahashi
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Paper 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.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91571H (2 June 2014); doi: 10.1117/12.2059466
Show Author Affiliations
Satoshi Tanaka, National Defense Academy (Japan)
Osamu Tsukida, National Defense Academy (Japan)
Makoto Takeuchi, National Defense Academy (Japan)
Shingo Tekuramori, National Defense Academy (Japan)
Ryotaro Uchimura, National Defense Academy (Japan)
Atsushi Wada, National Defense Academy (Japan)
Nobuaki Takahashi, National Defense Academy (Japan)


Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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