| Presentation | 2017-11-24 Reduction of modal birefringent fluctuation in 1-µm-band mode-detection optical time domain reflectometry Atsushi Nakamura, Yusuke Koshikiya, Tetsuya Manabe, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have proposed an optical time domain reflectometry (OTDR) that conducts measurements in the two-mode region of widely used single-mode fibers to detect optical loss increases due to macro/micro-bending early. To apply the technique to the maintenance of trunk lines that establish communication between central offices, it is essential for ensure the required dynamic range to introduce coherent detection. In coherent detection OTDRs, amplitude fluctuations that degrade loss measurement accuracy generally occur in the OTDR traces owing to the interference between backscattered lights and the polarization mismatch between the backscattered light and the local light. Unlike conventional coherent detection OTDRs, there exists another amplitude fluctuation resulting from both the modal birefringence that induces the intensity distribution evolution of the second-order mode along the fibers and the LP-mode separation characteristics of the mode coupler. In this paper, we describe the reduction techniques of the amplitude fluctuations, and confirm the usefulness experimentally. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | |
| Paper # | OFT2017-49 |
| Date of Issue | 2017-11-16 (OFT) |
| Conference Information | |
| Committee | OFT / OCS / IEE-CMN / ITE-BCT |
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| Conference Date | 2017/11/23(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kansa-Univ. Umeda Campus |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Masayuki Shigematsu(Sumitomo Electric Industries) / Itsuro Morita(KDDI Research) / Shun Morimura(CRIEPI) / Tomoaki Ohtsuki(Keio Univ.) |
| Vice Chair | / / / Naohiko Iai(NHK) / Yasushi Kasuga(TV Asahi) |
| Secretary | (NTT) / (Furukawa Electric) / (Sumitomo Electric Industries) / Naohiko Iai(NTT) / Yasushi Kasuga(NTT) |
| Assistant | Hiroshi Watanabe(NTT) / Katsuki Suematsu(Furukawa Electric) / / Tomotaka Kimura(Tokyo Univ. of Science) |
| Paper Information | |
| Registration To | Technical Committee on Optical Fiber Technology / Technical Committee on Optical Communication Systems / 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) | Reduction of modal birefringent fluctuation in 1-µm-band mode-detection optical time domain reflectometry |
| Sub Title (in English) | |
| Keyword(1) | |
| 1st Author's Name | Atsushi Nakamura |
| 1st Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 2nd Author's Name | Yusuke Koshikiya |
| 2nd Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 3rd Author's Name | Tetsuya Manabe |
| 3rd Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| Date | 2017-11-24 |
| Paper # | OFT2017-49 |
| Volume (vol) | vol.117 |
| Number (no) | OFT-323 |
| Page | pp.pp.29-32(OFT), |
| #Pages | 4 |
| Date of Issue | 2017-11-16 (OFT) |