Title:
光ファイバ特性測定装置及び方法
Document Type and Number:
Japanese Patent JP3607930
Kind Code:
B2
Abstract:
A light source produces laser beams that are subjected to frequency modulation whose frequency can be adequately set or varied. A light modulator modulates laser beams with respect to the center wavelength, so that the lower sideband is used as probe light input into one end of the measured optical fiber. A pulse modulator produces laser pulses based on laser beams as pump light, which is input into the other end of the measured optical fiber, along which correlation peaks emerge at different positions. The output light is extracted from the other end of the measured optical fiber and is supplied to a timing adjuster, which adjusts a transmission timing to allow transmission of light proximate to a measuring point in the measured optical fiber therethrough. Thus, it is possible to reliably measure characteristics of the measured optical fiber entirely over the relatively long distance with high spatial resolutions.
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Inventors:
Kazuo Hotate
Kinna Gensho
Kinna Gensho
Application Number:
JP2001201053A
Publication Date:
January 05, 2005
Filing Date:
July 02, 2001
Export Citation:
Assignee:
Kazuo Hotate
Ando Electric Co., Ltd.
Kyushu Ando Electric Co., Ltd.
Ando Electric Co., Ltd.
Kyushu Ando Electric Co., Ltd.
International Classes:
G01M11/00; G01M11/02; (IPC1-7): G01M11/02
Domestic Patent References:
| JP2000180265A | ||||
| JP9105701A | ||||
| JP10111171A | ||||
| JP9089714A | ||||
| JP7113723A |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama