Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1535462 | Optics Communications | 2013 | 5 Pages |
Abstract
We experimentally analyzed two different nonlinear fitting methods for a Brillouin optical time domain reflectometery (BOTDR) system. By measuring the spontaneous Brillouin frequency and comparing a Lorentzian fit with a Voigt fit, we confirmed that the accuracy of the Lorentzian fit was higher than that of the Voigt fit. We also performed long-range distributed measurements using coherent detection system with a 36 km long-range optical fiber. The extinction ratio of optical pulse was improved by employing an acousto-optic modulator (AOM). As a result, we could successfully measure the Brillouin frequency shift (BFS) using a Lorentzian fit algorithm in order to calculate applied temperature and strain in the optical fiber.
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Authors
Hyungwoo Kwon, Suhwan Kim, Sehyuk Yeom, Byoungho Kang, Kyujin Kim, Taeheok Kim, Hangseok Jang, Jeehyun Kim, Shinwon Kang,