Highly sensitive operation of intensity-based fiber-optic vibration sensor using cascaded long period fiber grating

被引：5

作者：

Tanaka, Satoshi ^{[1
]}

Tsukida, Osamu ^{[1
]}

Takeuchi, Makoto ^{[1
]}

Tekuramori, Shingo ^{[1
]}

Uchimura, Ryotaro ^{[1
]}

Wada, Atsushi ^{[1
]}

Takahashi, Nobuaki ^{[1
]}

机构：

[1] Natl Def Acad, Dept Commun Engn, Yokosuka, Kanagawa 2398686, Japan

来源：

23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS | 2014年 / 9157卷

关键词：

intensity-based fiber-optic sensor; cascaded long period fiber grating; mechanical vibration sensor; TEMPERATURE COMPENSATION;

D O I：

10.1117/12.2059466

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：4

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