| Presentation | 2010-01-22 Combination of External Phase Modulation and Synthesis of Optical Coherence Function for Improvement of Spatial Resolution in Long-length FBG Sensing System Koji KAJIWARA, Zuyuan HE, Kazuo HOTATE, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | External phase modulation is newly combined with the synthesis of optical coherence function for improvement of spatial resolution in distributed sensing system using a long-length fiber Bragg grating. It is possible to know the Bragg wavelength distribution along a long-length FBG by measuring local reflection spectra inside the grating, and this technique can be applied to a distributed sensing of strain and temperature. The spatial resolution of sensing systems based on synthesis of optical coherence function is inversely proportional to the optical power spectrum band-width of the light source. Therefore, we newly introduced external optical phase modulation to enlarge the bandwidth of the lightwave. The spatial resolution is improved from previously-reported 9.8mm to 4.0mm. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Fiber Bragg Grating / Distributed Sensor / Synthesis of Optical Coherence Function / External phase modulation |
| Paper # | OFT2009-76 |
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| Conference Information | |
| Committee | OFT |
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| Conference Date | 2010/1/14(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) | Combination of External Phase Modulation and Synthesis of Optical Coherence Function for Improvement of Spatial Resolution in Long-length FBG Sensing System |
| Sub Title (in English) | |
| Keyword(1) | Fiber Bragg Grating |
| Keyword(2) | Distributed Sensor |
| Keyword(3) | Synthesis of Optical Coherence Function |
| Keyword(4) | External phase modulation |
| 1st Author's Name | Koji KAJIWARA |
| 1st Author's Affiliation | Department of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo() |
| 2nd Author's Name | Zuyuan HE |
| 2nd Author's Affiliation | Department of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo |
| 3rd Author's Name | Kazuo HOTATE |
| 3rd Author's Affiliation | Department of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo |
| Date | 2010-01-22 |
| Paper # | OFT2009-76 |
| Volume (vol) | vol.109 |
| Number (no) | 377 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |