Brillouin optical correlation domain reflectometry with lock-in detection scheme

被引：0
|
作者：
Yao, Yuguo [1 ]
Kishi, Masato [1 ]
Hotate, Kazuo [1 ]
机构：
[1] Univ Tokyo, Dept Elect Engn & Informat Syst, Bunkyo Ku, Tokyo 1138656, Japan
来源：
FIFTH ASIA-PACIFIC OPTICAL SENSORS CONFERENCE | 2015年 / 9655卷
关键词：
Brillouin scattering; distributed optical fiber sensing; BOCDR; lock-in detection; MEASUREMENT RANGE ENLARGEMENT; PROPOSAL;
D O I：
10.1117/12.2184392
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：
We have proposed a Brillouin optical correlation domain reflectometry (BOCDR) with lock-in detection scheme. The weak and noisy spontaneous Brillouin signal is output from the electrical spectrum analyzer as an analog signal, and detected synchronously and amplified using a lock-in amplifier. By further introducing phase modulation into the system to suppress the background optical noise, and using large frequency modulation amplitude with appropriate filtering, the performance of the system is enhanced. A 4cm spatial resolution is experimented over 100m measurement range.
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页数：4
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