Presentation 1998/5/11
FMCW Reflectometry for Optical Fiber Diagnosis Using an External-Cavity Laser Diode
Koichi IIYAMA, Shotaro ITAKURA, Takahiro MAEDA, Shoshin HASHIMOTO, Saburo TAKAMIYA,
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Abstract(in English) We describe FMCW reflectometry for optical fiber diagnosis using an external-cavity laser diode. In this system, the optical path difference between the reference beam and the reflected beam from the optical fiber under test is longer than the coherence length of the light source, and the beat spectrum between them is measured. The spatial resolution can be enhanced with narrowing the spectral linewidth of the light source and/or with increasing the repetition frequency of the optical frequency sweep. In the experiments, an external-cavity laser diode was used as the light source, and the spatial resolution of 23 m at the far end of a 5 km-long optical fiber was achieved. The beat spectrum was calculated by taking account of the phase fluctuation of the light source, and the calculated spectrum agreed with the measured spectrum.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Optical interferometric sensor / FMCW reflectometry / Laser diode / Modulation
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Committee LQE
Conference Date 1998/5/11(1days)
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Registration To Lasers and Quantum Electronics (LQE)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) FMCW Reflectometry for Optical Fiber Diagnosis Using an External-Cavity Laser Diode
Sub Title (in English)
Keyword(1) Optical interferometric sensor
Keyword(2) FMCW reflectometry
Keyword(3) Laser diode
Keyword(4) Modulation
1st Author's Name Koichi IIYAMA
1st Author's Affiliation Faculty of Engineering, Kanazawa University()
2nd Author's Name Shotaro ITAKURA
2nd Author's Affiliation Faculty of Engineering, Kanazawa University
3rd Author's Name Takahiro MAEDA
3rd Author's Affiliation Faculty of Engineering, Kanazawa University
4th Author's Name Shoshin HASHIMOTO
4th Author's Affiliation Faculty of Engineering, Kanazawa University
5th Author's Name Saburo TAKAMIYA
5th Author's Affiliation Faculty of Engineering, Kanazawa University
Date 1998/5/11
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Volume (vol) vol.98
Number (no) 41
Page pp.pp.-
#Pages 6
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