50 km-Range Brillouin Optical Correlation Domain Analysis with First-Order Backward Distributed Raman Amplification
- Authors
- Ryu, Gukbeen; Kim, Gyu-Tae; Song, Kwang Yong; Lee, Sang Bae; Lee, Kwanil
- Issue Date
- Sep-2020
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Keywords
- Optical fiber sensor; Raman scattering; Stimulated brillouin scattering; time domain analysis
- Citation
- Journal of Lightwave Technology, v.38, no.18, pp 5199 - 5204
- Pages
- 6
- Journal Title
- Journal of Lightwave Technology
- Volume
- 38
- Number
- 18
- Start Page
- 5199
- End Page
- 5204
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/52872
- DOI
- 10.1109/JLT.2020.3001585
- ISSN
- 0733-8724
1558-2213
- Abstract
- We demonstrate the enlargement of sensing range of Brillouin optical correlation domain analysis (BOCDA) system by introducing the first-order distributed Raman amplification. The time-domain data processing is adopted for the BOCDA system utilizing a gated Brillouin pump, and the Raman amplification is applied to compensate for the depletion of Brillouin pump induced by Rayleigh scattering and Brillouin interaction. The Raman pump is injected in the opposite direction to the propagation of Brillouin pump, where the pumping scheme is optimized by simulations. A differential measurement scheme is additionally introduced for improving spatial resolution and dynamic range. In experiments, we measure the strain distribution along a 52.1 km sensing fiber with 7 cm spatial resolution, where the number of resolving points of measurement is more than 744 000. © 1983-2012 IEEE.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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