Fast Brillouin optical time-domain reflectometry using the optical chirp chain reference wave

被引：10

作者：

Ba, Dexin ^{[1
]}

Wang, Benzhang ^{[1
]}

Li, Tianfu ^{[1
]}

Li, Yijia ^{[1
]}

Zhou, Dengwang ^{[1
]}

Dong, Yongkang ^{[1
]}

机构：

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

来源：

OPTICS LETTERS | 2020年 / 45卷 / 19期

基金：

中国国家自然科学基金;

关键词：

PERFORMANCE; BOTDA;

D O I：

10.1364/OL.404229

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A new technique for the fast implementation of Brillouin optical time-domain reflectometry has been proposed and demonstrated with the optical chirp chain (OCC) reference wave. By using the fixed bandpass filter and envelope detection, the spontaneous Brillouin spectrum can be online demodulated in the time domain for truly distributed, one-end access and fast measurement. The measurement time is only limited by the pulse repetition rate and averaging times. For a 400 m single-mode fiber, a 31.58 Hz strain vibration on a 2 m fiber segment is measured for a wide dynamic range (similar to 3200 mu epsilon) with an equivalent sampling rate of 200 Hz when 200 times of averaging is performed. Furthermore, the performance on the measurement accuracy is investigated with different OCC frequency spans and durations. (C) 2020 Optical Society of America

引用

页码：5460 / 5463

页数：4

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