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.
Bibliographical notePublisher Copyright:
© 1983-2012 IEEE.
- Brillouin optical correlation domain analysis (BOCDA)
- Distributed fiber optic sensor
- Raman amplification
- Stimulated Brillouin scattering (SBS)
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics