Abstract

We propose and experimentally demonstrate a long-range Brillouin optical correlation domain analysis (BOCDA) system based on distributed Raman amplification and injection-locking to reach over 2.6 million resolving points. The optimization of key parameters in the Raman amplification, time domain data processing, differential measurement scheme, and injection-locking are applied to achieve a spatial resolution of 2 cm over a 50 km sensing fiber. Our result corresponds to at least twice improvement compared to former records, and the best one among distributed Brillouin sensors in terms of the number of resolving points.

Brillouin optical correlation domain analysis with more than 1 million effective sensing points based on differential measurement

Yong Hyun Kim, Kwanil Lee, and Kwang Yong Song
Opt. Express 23(26) 33241-33248 (2015)

Differential measurement scheme for Brillouin Optical Correlation Domain Analysis

Ji Ho Jeong, Kwanil Lee, Kwang Yong Song, Je-Myung Jeong, and Sang Bae Lee
Opt. Express 20(24) 27094-27101 (2012)

Variable-frequency lock-in detection for the suppression of beat noise in Brillouin optical correlation domain analysis

Ji Ho Jeong, Kwanil Lee, Kwang Yong Song, Je-Myung Jeong, and Sang Bae Lee
Opt. Express 19(19) 18721-18728 (2011)

Time-gated chaotic Brillouin optical correlation domain analysis

Jianzhong Zhang, Yahui Wang, Mingjiang Zhang, Qian Zhang, Mengwen Li, Chenyu Wu, Lijun Qiao, and Yuncai Wang
Opt. Express 26(13) 17597-17607 (2018)

Bidirectional measurement for Brillouin optical correlation domain analysis

Ji Ho Jeong, Kwanil Lee, Kwang Yong Song, Je-Myung Jeong, and Sang Bae Lee
Opt. Express 20(10) 11091-11096 (2012)