Numerical Investigation of Golay Coding Brillouin Optical Time-Domain Analysis System Based on π-Phase Pulse

被引：3
|
作者：
Liu, Shuangshuang [1 ,2 ]
Zhang, Xiaocheng [1 ,2 ]
Zhang, Yuting [1 ,2 ]
Liang, Zefeng [1 ,2 ]
Zhang, Jianzhong [1 ,2 ]
Qiao, Lijun [1 ,2 ]
Wang, Tao [1 ,2 ]
Gao, Shaohua [1 ,2 ]
Zhang, Mingjiang [1 ,2 ]
机构：
[1] Minist Educ & Shanxi Prov, Key Lab Adv Transducers & Intelligent Control Sys, Taiyuan 030024, Shanxi, Peoples R China
[2] Taiyuan Univ Technol, Inst Optoelect Engn, Dept Optoelect, Taiyuan 030024, Shanxi, Peoples R China
来源：
IEEE SENSORS JOURNAL | 2022年 / 22卷 / 03期
关键词：
Brillouin optical fiber sensing; BOTDA; Golay codes; pi-phase pulse; MODULATION INSTABILITY; BOTDA; SENSOR; PERFORMANCE; PAIR;
D O I：
10.1109/JSEN.2021.3135302
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel configuration of Golay coding based on pi-phase pulse is proposed to overcome the trade-off between the spatial resolution and the sensing range of the conventional Brillouin optical time-domain analysis (BOTDA) system. The mathematical model of hybrid coding is established by solving the three-wave coupled equations. The tests are performed to analyze the autocorrelation properties of hybrid coding and the influence of the pulsewidth on the Brillouin gain spectrum. Using 512-bitGolay codes combining with 500 ps phase shift pulse, signal-to-noise ratio (SNR) is enhanced by 10.53 dB to ensure that SNR at the end of the 50-km-long fiber is above 16 dB. Under this condition, the spatial resolution of 5 cm is achieved along 50 km sensing fiber.
引用
收藏
页码：2190 / 2197
页数：8
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