Brillouin Optical Correlation Domain Analysis With Over 2.5 Million Resolution Points Based on Raman Amplification and Injection Locking
Wookjin Jeong, Gyu‐Tae Kim, Kwang Yong Song, Sang Bae Lee, Kwanil Lee
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.
Topics & Concepts
Brillouin zoneRaman amplificationOpticsBrillouin scatteringRaman spectroscopyDomain analysisOptical fiberTime domainMaterials scienceImage resolutionMulti-mode optical fiberDistributed acoustic sensingRaman scatteringFiber optic sensorPhysicsComputer scienceComputer visionSoftware systemSoftwareProgramming languageSoftware constructionAdvanced Fiber Optic SensorsAdvanced Fiber Laser TechnologiesOptical Network Technologies