Phase-coded Brillouin optical correlation domain analysis with 2-mm resolution based on phase-shift keying

被引：29

作者：

Ba, Dexin ^{[1
]}

Li, Yue ^{[1
]}

Yan, Jialiang ^{[1
]}

Zhang, Xiaopei ^{[1
]}

Dong, Yongkang ^{[1
]}

机构：

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

来源：

OPTICS EXPRESS | 2019年 / 27卷 / 25期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

ORDER SPATIAL-RESOLUTION; STRAIN-MEASUREMENT; TIME-DOMAIN; SENSOR;

D O I：

10.1364/OE.27.036197

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a phase-coded Brillouin optical correlation-domain analysis (BOCDA) based on phase-shift keying (PSK), in which the pseudo-random binary sequence (PRBS) phase coding is realized using a Mach-Zehnder modulator (MZM). Unlike the conventional phase-coded BOCDA using a phase modulator, which suffers from the non-rectangular transition in the encoded phase, the PSK can realize perfect phase switches between 0 and pi with zero-width edges. It is not sensitive to the bandwidth of the modulator and the power of the radio-frequency modulation signal. Numerical simulations and experimental results prove that it can effectively suppress the Brillouin amplification in the off-peak positions. In experiment, a 2-mm spatial resolution sensing is realized using only a 20-GHz bandwidth MZM. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：36197 / 36205

页数：9

共 30 条

[1] Recent Progress in Distributed Fiber Optic Sensors [J].