| Presentation | 2021-10-14 [Poster Presentation] Strain dynamic range extension in slope-assisted BOCDR based on down-conversion of Brillouin frequency shift Haruki Sasage, Mana Sakamoto, 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 merits including single-end operation, high spatial resolution, random accessibility, and cost efficiency. To boost the operation speed of BOCDR, a frequency-sweeping-free configuration called slope-assisted BOCDR was developed, which enabled real-time operation at the cost of limited strain dynamic range. In addition, use of an electrical spectrum analyzer (ESA) degraded the system size and cost. In this work, we develop a new method for obtaining the strain information by (1) beating down of the Brillouin gain spectrum (BGS), (2) directing the BGS to a low-pass filter, and (3) measuring the power of the electrical output from the low-pass filter. This system does not include an ESA, and in addition, the strain dynamic range is expected to be doubled. Herein, in the case of full-length measurement (not distributed measurement), basic operation of this system is demonstrated with enhanced strain dynamic range. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical fiber sensors / Brillouin scattering / Distributed measurement / Correlation-domain techniques / Beating down / Low-pass filters / Strain dynamic range |
| Paper # | OFT2021-36 |
| 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] Strain dynamic range extension in slope-assisted BOCDR based on down-conversion of Brillouin frequency shift |
| Sub Title (in English) | |
| Keyword(1) | Optical fiber sensors |
| Keyword(2) | Brillouin scattering |
| Keyword(3) | Distributed measurement |
| Keyword(4) | Correlation-domain techniques |
| Keyword(5) | Beating down |
| Keyword(6) | Low-pass filters |
| Keyword(7) | Strain dynamic range |
| 1st Author's Name | Haruki Sasage |
| 1st Author's Affiliation | Shibaura Institute of Technology(SIT) |
| 2nd Author's Name | Mana Sakamoto |
| 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 # | OFT2021-36 |
| Volume (vol) | vol.121 |
| Number (no) | OFT-199 |
| Page | pp.pp.59-62(OFT), |
| #Pages | 4 |
| Date of Issue | 2021-10-07 (OFT) |