Single-shot distributed Brillouin optical time domain analyzer

被引：39

作者：

Fang, Jian ^{[1
]}

Xu, Pengbai ^{[2
]}

Dong, Yongkang ^{[2
]}

Shieh, William ^{[1
]}

机构：

[1] Univ Melbourne, Dept Elect & Elect Engn, Melbourne, Vic 3010, Australia

[2] Harbin Inst Technol, Natl Key Lab Sci & Technol Tunable Laser, Harbin 150001, Peoples R China

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 13期

基金：

中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

SCATTERING; FIBERS; OFDM;

D O I：

10.1364/OE.25.015188

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a novel single-shot distributed Brillouin optical time domain analyzer (SS-BOTDA). In our method, dual-polarization probe with orthogonal frequency-division multiplexing (OFDM) modulation is used to acquire the distributed Brillouin gain spectra, and coherent detection is used to enhance the signal-to-noise ratio (SNR) drastically. Distributed temperature sensing is demonstrated over a 1.08 km standard single-mode fiber (SSMF) with 20.48 m spatial resolution and 0.59 degrees C temperature accuracy. Neither frequency scanning, nor polarization scrambling, nor averaging is required in our scheme. All the data are obtained through only one-shot measurement, indicating that the sensing speed is only limited by the length of fiber. (C) 2017 Optical Society of America.

引用

页码：15188 / 15198

页数：11

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