| Presentation | 2023-11-10 High-accuracy distributed strain sensing based on low-coherence BOCDR: simulation and experimental validation Kenta Otsubo, Guangtao Zhu, Takaki Kiyozumi, Hiroshi Takahashi, Yusuke Koshikiya, Yosuke Mizuno, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | As a principle of distributed measurement of strain and temperature along an optical fiber, the strain/temperature dependencies of the frequency shift accompanied by Brillouin scattering have been widely utilized. Among various methods already reported, a correlation-domain method has advantages such as random accessibility and relatively high spatial resolution compared to other distributed measurement methods. However, in the method of directly modulating the laser frequency with sinusoidal waves, the amplitude modulation is inevitably accompanied, and the phase difference between amplitude modulation and frequency modulation, called AM-FM phase delay, deteriorates the precision of distributed strain/temperature measurement. In this work, we demonstrate from both simulation and experimental aspects that this effect can be mitigated using low-coherence Brillouin optical correlation-domain reflectometry (LC-BOCDR) based on periodic noise modulation. We investigate the characteristics of signal light modulated by periodic noise modulation and demonstrate through high-precision distributed strain measurements that this method will be an innovative technique with several advantages compared to standard sinusoidal-modulation BOCDR. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical fiber sensors / Brillouin optical correlation-domain reflectometry / low coherence / noise modulation |
| Paper # | OFT2023-52 |
| Date of Issue | 2023-11-02 (OFT) |
| Conference Information | |
| Committee | OCS / OFT / IEE-CMN / ITE-BCT |
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| Conference Date | 2023/11/9(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Takayuki Kobayashi(NTT) / Makoto Yamada(Osaka Metropolitan Univ.) / Shun Morimura(CRIEPI) |
| Vice Chair | / / Kouji Hirata(Kansai Univ) |
| Secretary | (NTT) / (Sumitomo Electric Industries) / Kouji Hirata(NTT) / (Furukawa Electric) |
| Assistant | / Yukihiro Goto(NTT) / Yoshitomo Kobayashi(Furukawa Electric) / Yuuichi Shinohara(TEPCO Power Grid) / Akihiro Tanaka(CRIEPI) |
| Paper Information | |
| Registration To | Technical Committee on Optical Communication Systems / Technical Committee on Optical Fiber Technology / Technical Meeting on Communications / Technical Group on Broadcasting Technology |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | High-accuracy distributed strain sensing based on low-coherence BOCDR: simulation and experimental validation |
| Sub Title (in English) | |
| Keyword(1) | Optical fiber sensors |
| Keyword(2) | Brillouin optical correlation-domain reflectometry |
| Keyword(3) | low coherence |
| Keyword(4) | noise modulation |
| 1st Author's Name | Kenta Otsubo |
| 1st Author's Affiliation | Yokohama National University(YNU) |
| 2nd Author's Name | Guangtao Zhu |
| 2nd Author's Affiliation | Yokohama National University(YNU) |
| 3rd Author's Name | Takaki Kiyozumi |
| 3rd Author's Affiliation | Yokohama National University(YNU) |
| 4th Author's Name | Hiroshi Takahashi |
| 4th Author's Affiliation | Yokohama National University/Nippon Telegraph and Telephone Corporation(YNU/NTT) |
| 5th Author's Name | Yusuke Koshikiya |
| 5th Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 6th Author's Name | Yosuke Mizuno |
| 6th Author's Affiliation | Yokohama National University(YNU) |
| Date | 2023-11-10 |
| Paper # | OFT2023-52 |
| Volume (vol) | vol.123 |
| Number (no) | OFT-244 |
| Page | pp.pp.24-29(OFT), |
| #Pages | 6 |
| Date of Issue | 2023-11-02 (OFT) |