Passive interrogation of an extrinsic Fabry-Perot interferometer using a three-wavelength method

被引：9

作者：

Jiang, Yi ^{[1
]}

Tang, Caijie ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Optolect, Beijing 100081, Peoples R China

来源：

OPTICAL ENGINEERING | 2009年 / 48卷 / 06期

关键词：

fiber-optic sensors; extrinsic Fabry-Perot interferometer (EFPI); fiber Bragg grating (FBG); WHITE-LIGHT INTERFEROMETRY; SIGNAL-PROCESSING TECHNIQUE; SENSORS; LASER;

D O I：

10.1117/1.3156018

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A three-wavelength method is developed to interrogate an extrinsic Fabry-Perot interferometer (EFPI) for the measurement of a dynamic measurand. Three signals 120 deg out of phase are created by using three fiber Bragg gratings (FBGs). A phase demodulator, which is the same as that used for demodulating a 3 x 3 coupler-based interferometer, is used to measure the phase change. A minimum detectable phase of 0.43 mu rad/ Hz(1/2) is achieved. (C) 2009 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3156018]

引用

页数：5

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