| Presentation | 2007-08-24 Practical method for measuring distributed strain and temperature with very high measurand resolution based on Rayleigh backscatter traces at multiple laser frequencies Yahei KOYAMADA, Mutsumi IMAHAMA, Kazuo HOGARI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have proposed previously a technique for measuring distributed strain and temperature with a very high measurand resolution. This technique makes use of the jagged appearance of Rayleigh backscatter traces from a single-mode fiber measured using a coherent optical time-domain reflectometer (OTDR) with a precisely frequency-controlled light source. However, the restorability of the Rayleigh backscatter traces that is essential for our measurement technique has not been confirmed experimentally as yet and the measurement procedure has still to be studied. In this paper, we present experimental results that confirm, for the first time, the restorability of the Rayleigh backscatter traces. In addition, we describe a practical method to derive the strain or temperature distribution from Rayleigh backscatter traces measured at multiple laser frequencies. Our numerical simulation, which includes an estimation of the signal-to-noise ratio of the OTDR, shows that the technique enables us to measure distributed strain / temperature with a resolution better than 1μ strain/0.1℃and a spatial resolution of 10cm over a 20-km long fiber. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Fiber sensor / Rayleigh scattering / distributed sensor / strain sensor / temperature sensor / OTDR |
| Paper # | OFT2007-29 |
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| Conference Information | |
| Committee | OFT |
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| Conference Date | 2007/8/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Optical Fiber Technology (OFT) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Practical method for measuring distributed strain and temperature with very high measurand resolution based on Rayleigh backscatter traces at multiple laser frequencies |
| Sub Title (in English) | |
| Keyword(1) | Fiber sensor |
| Keyword(2) | Rayleigh scattering |
| Keyword(3) | distributed sensor |
| Keyword(4) | strain sensor |
| Keyword(5) | temperature sensor |
| Keyword(6) | OTDR |
| 1st Author's Name | Yahei KOYAMADA |
| 1st Author's Affiliation | Faculty of Engineering, Ibaraki University() |
| 2nd Author's Name | Mutsumi IMAHAMA |
| 2nd Author's Affiliation | Faculty of Engineering, Ibaraki University |
| 3rd Author's Name | Kazuo HOGARI |
| 3rd Author's Affiliation | Faculty of Engineering, Ibaraki University |
| Date | 2007-08-24 |
| Paper # | OFT2007-29 |
| Volume (vol) | vol.107 |
| Number (no) | 191 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |