1 July 2015 Brillouin optical correlation domain reflectometry with lock-in detection scheme
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Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96553L (2015) https://doi.org/10.1117/12.2184392
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of
Abstract
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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Yuguo Yao, Yuguo Yao, Masato Kishi, Masato Kishi, Kazuo Hotate, Kazuo Hotate, } "Brillouin optical correlation domain reflectometry with lock-in detection scheme", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96553L (1 July 2015); doi: 10.1117/12.2184392; https://doi.org/10.1117/12.2184392
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