| Presentation | 2021-10-14 [Poster Presentation] Attempt to optimize delay fiber length in BOCDR Mana Sakamoto, Haruki Sasage, Kohei Noda, Kentaro Nakamura, Yosuke Mizuno, Heeyoung Lee, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Brillouin optical correlation-domain reflectometry (BOCDR) is known as a distributed strain and temperature sensing technique with numerous advantages, such as operation by light injection to a single end of a sensing fiber, high spatial resolution, random accessibility to measuring points, and cost efficiency. In general, a relatively long delay fiber is inserted into a reference optical path to control the order of a correlation peak (corresponding to a sensing point) and to enable appropriate operation of the system. Excessively long or short delay fibers are known to deteriorate the system performance, but the optimal length of the delay fiber has not been clarified yet. In this work, as the first step to optimize the delay fiber length in BOCDR, in the case of full-length measurement (not distributed measurement), Brillouin gain spectra (BGSs) were evaluated when delay fibers with different lengths were used in the reference path. When the delay fiber is long, forwardly transmitted light involves Brillouin components caused either by Rayleigh backscattering after Brillouin backscattering or Brillouin backscattering after Rayleigh backscattering. We also experimentally proved this mechanism by investigating the BGS dependence on the relative polarization state. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Distributed optical fiber sensors / Brillouin scattering / Rayleigh scattering / Delay fibers / Correlation-domain techniques |
| Paper # | OFT2021-26 |
| Date of Issue | 2021-10-07 (OFT) |
| Conference Information | |
| Committee | OFT |
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| Conference Date | 2021/10/14(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Yuji Matsuura(Tohoku Univ.) |
| Vice Chair | |
| Secretary | (NTT) |
| Assistant | Yukihiro Goto(NTT) / Minoru Takahashi(Fujikura) |
| Paper Information | |
| Registration To | Technical Committee on Optical Fiber Technology |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Poster Presentation] Attempt to optimize delay fiber length in BOCDR |
| Sub Title (in English) | |
| Keyword(1) | Distributed optical fiber sensors |
| Keyword(2) | Brillouin scattering |
| Keyword(3) | Rayleigh scattering |
| Keyword(4) | Delay fibers |
| Keyword(5) | Correlation-domain techniques |
| 1st Author's Name | Mana Sakamoto |
| 1st Author's Affiliation | Shibaura Institute of Technology(SIT) |
| 2nd Author's Name | Haruki Sasage |
| 2nd Author's Affiliation | Shibaura Institute of Technology(SIT) |
| 3rd Author's Name | Kohei Noda |
| 3rd Author's Affiliation | Tokyo Institute of Technology/Yokohama National University(Tokyo Tech/YNU) |
| 4th Author's Name | Kentaro Nakamura |
| 4th Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 5th Author's Name | Yosuke Mizuno |
| 5th Author's Affiliation | Yokohama National University(YNU) |
| 6th Author's Name | Heeyoung Lee |
| 6th Author's Affiliation | Shibaura Institute of Technology(SIT) |
| Date | 2021-10-14 |
| Paper # | OFT2021-26 |
| Volume (vol) | vol.121 |
| Number (no) | OFT-199 |
| Page | pp.pp.19-22(OFT), |
| #Pages | 4 |
| Date of Issue | 2021-10-07 (OFT) |