| Presentation | 2009-03-06 Stable entire-length measurement of fiber strain distribution by Brillouin optical correlation-domain reflectometry with polarization scrambling Yosuke MIZUNO, Zuyuan HE, Kazuo HOTATE, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently we have proposed a Brillouin optical correlation-domain reflectometry (BOCDR) to measure the distribution of strain and/or temperature along an optical fiber from a single end, and obtained 13-mm spatial resolution and 50-Hz sampling rate simultaneously. However, since the measured Brillouin gain spectrum (BGS) in BOCDR was sensitive to the state of polarization (SOP), frequent SOP optimization by manually adjusting polarization controllers was needed for a distributed strain/temperature measurement along a long fiber. In this paper, we realize a stable high-speed entire-length measurement of strain distribution by suppressing the BGS fluctuation automatically based on a polarization scrambling scheme. In the experiment, strain distribution along the entire length of a 100-m fiber was successfully measured with 40-cm spatial resolution and 19-Hz sampling rate. We also demonstrate an S/N ratio improvement based on noise-floor compensation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical fiber sensor / distributed strain measurement / Brillouin optical correlation-domain reflectometry (BOCDR) / spontaneous Brillouin scattering / synthesis of optical coherence function (SOCF) / polarization scrambling |
| Paper # | OFT2008-93,OPE2008-193 |
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| Conference Information | |
| Committee | OFT |
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| Conference Date | 2009/2/27(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 | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Stable entire-length measurement of fiber strain distribution by Brillouin optical correlation-domain reflectometry with polarization scrambling |
| Sub Title (in English) | |
| Keyword(1) | Optical fiber sensor |
| Keyword(2) | distributed strain measurement |
| Keyword(3) | Brillouin optical correlation-domain reflectometry (BOCDR) |
| Keyword(4) | spontaneous Brillouin scattering |
| Keyword(5) | synthesis of optical coherence function (SOCF) |
| Keyword(6) | polarization scrambling |
| 1st Author's Name | Yosuke MIZUNO |
| 1st Author's Affiliation | Department of Electrical Engineering and Information Systems, The University of Tokyo() |
| 2nd Author's Name | Zuyuan HE |
| 2nd Author's Affiliation | Department of Electrical Engineering and Information Systems, The University of Tokyo |
| 3rd Author's Name | Kazuo HOTATE |
| 3rd Author's Affiliation | Department of Electrical Engineering and Information Systems, The University of Tokyo |
| Date | 2009-03-06 |
| Paper # | OFT2008-93,OPE2008-193 |
| Volume (vol) | vol.108 |
| Number (no) | 450 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |