Quasidistributed fiber Bragg grating sensor network based on self-heterodyne detection technique

被引：5

作者：

Zhang, Sheqiang ^{[1
,4
]}

Chen, Ming ^{[1
,4
]}

He, Qian ^{[1
,2
]}

Chen, Wei ^{[3
]}

Chen, Hui ^{[1
,4
]}

Li, Haiou ^{[1
,4
]}

机构：

[1] Guilin Univ Elect Technol, Guangxi Expt Ctr Informat Sci, Guilin 541004, Peoples R China

[2] Beijing Univ Posts & Telecommun, State Key Lab Networking & Switching Technol, Beijing 100876, Peoples R China

[3] Fiber Home Telecommun Technol Co Ltd, Wuhan Res Inst Post & Telecommun, Wuhan 430074, Peoples R China

[4] Guilin Univ Elect Technol, Sch Informat & Commun, Guilin 541004, Peoples R China

来源：

OPTICAL ENGINEERING | 2014年 / 53卷 / 05期

基金：

美国国家科学基金会;

关键词：

fiber Bragg grating; optical fiber sensors; self-heterodyne detection; time-division-multiplexing; ARRAY;

D O I：

10.1117/1.OE.53.5.057107

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A serial time-division multiplexing optical fiber sensing network with a large multiplexing capacity, which is based on identical ultraweak fiber Bragg gratings (FBGs) and self-heterodyne detection technique, is proposed. An experimental system, which has 10 identical ultraweak FBGs with the same Bragg wavelength of 1550 nm, reflectivity of -36 dB, and bandwidth of 0.1 nm, is set up to investigate the performance of the proposed scheme. The spectra of 10 ultraweak FBGs are resolved with a high accuracy, and the wavelength-temperature sensitivity and temperature resolution of the system are 10.5 pm/degrees C, 0.09 degrees C, respectively. A self-heterodyne detection technique is adopted to increase the sensitivity of the receiver, which makes it possible to multiplex over 1000 FBGs along a single optical fiber. Theoretical analyses demonstrate that this sensing scheme can effectively increase the multiplexing capacity and measurement accuracy. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)

引用

页数：7

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