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Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing
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Recent Advances in Brillouin Optical Correlation-Domain Reflectometry

Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
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Appl. Sci. 2018, 8(10), 1845; https://doi.org/10.3390/app8101845
Received: 13 September 2018 / Revised: 4 October 2018 / Accepted: 5 October 2018 / Published: 8 October 2018
(This article belongs to the Special Issue Optical Correlation-domain Distributed Fiber Sensors)
Distributed fiber-optic sensing based on Brillouin scattering has been extensively studied and many configurations have been developed so far. In this paper, we review the recent advances in Brillouin optical correlation-domain reflectometry (BOCDR), which is known as a unique technique with intrinsic single-end accessibility, high spatial resolution, and cost efficiency. We briefly discuss the advantages and disadvantages of BOCDR over other Brillouin-based distributed sensing techniques, and present the fundamental principle and properties of BOCDR with some special schemes for enhancing the performance. We also describe the recent development of a high-speed configuration of BOCDR (slope-assisted BOCDR), which offers a beyond-nominal-resolution detectability. The paper is summarized with some future prospects. View Full-Text
Keywords: Brillouin scattering; optical fiber sensing; optical correlation-domain reflectometry; distributed sensing; strain sensing; temperature sensing; nonlinear optics; structural health monitoring Brillouin scattering; optical fiber sensing; optical correlation-domain reflectometry; distributed sensing; strain sensing; temperature sensing; nonlinear optics; structural health monitoring
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Mizuno, Y.; Lee, H.; Nakamura, K. Recent Advances in Brillouin Optical Correlation-Domain Reflectometry. Appl. Sci. 2018, 8, 1845.

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