| Presentation | 2023-10-12 [Poster Presentation] Proposal of low-coherence BOCDR based on periodic noise modulation Kenta Otsubo, 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. To make the most of this advantage of high spatial resolution, several methods, which use a low coherence light source such as amplified spontaneous emission light sources and noise-modulated lasers, have been developed. In this low-coherence method, as its spatial resolution is determined by the coherence length of the light source, submillimeter spatial resolution has been demonstrated. However, as a mechanically controlled variable delay line needs to be used to sweep the measurement point, measurement range is limited to the variable length of the delay line, and consequently, there is a disadvantage that this system has difficulty in measuring over a long distance of the order of kilometers. In this work, we propose a new technique for modulation of light source using a periodic noise wave and try to implement an innovative distributed measurement system free from the measurement range limit even with high spatial resolution. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical fiber sensors / Brillouin optical correlation-domain reflectometry / low coherence / periodic noise modulation |
| Paper # | OFT2023-30 |
| Date of Issue | 2023-10-05 (OFT) |
| Conference Information | |
| Committee | OFT |
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| Conference Date | 2023/10/12(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Makoto Yamada(Osaka Metropolitan Univ.) |
| Vice Chair | |
| Secretary | (NTT) |
| Assistant | Yukihiro Goto(NTT) / Yoshitomo Kobayashi(Furukawa Electric) |
| 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] Proposal of low-coherence BOCDR based on periodic noise modulation |
| Sub Title (in English) | |
| Keyword(1) | Optical fiber sensors |
| Keyword(2) | Brillouin optical correlation-domain reflectometry |
| Keyword(3) | low coherence |
| Keyword(4) | periodic noise modulation |
| 1st Author's Name | Kenta Otsubo |
| 1st Author's Affiliation | Yokohama National University(YNU) |
| 2nd Author's Name | Takaki Kiyozumi |
| 2nd Author's Affiliation | Yokohama National University(YNU) |
| 3rd Author's Name | Hiroshi Takahashi |
| 3rd Author's Affiliation | Yokohama National University/Nippon Telegraph and Telephone Corporation(YNU/NTT) |
| 4th Author's Name | Yusuke Koshikiya |
| 4th Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 5th Author's Name | Yosuke Mizuno |
| 5th Author's Affiliation | Yokohama National University(YNU) |
| Date | 2023-10-12 |
| Paper # | OFT2023-30 |
| Volume (vol) | vol.123 |
| Number (no) | OFT-210 |
| Page | pp.pp.59-62(OFT), |
| #Pages | 4 |
| Date of Issue | 2023-10-05 (OFT) |