G - Physics – 01 – M
Patent
G - Physics
01
M
G01M 11/02 (2006.01) G01M 11/00 (2006.01) H04B 10/08 (2006.01)
Patent
CA 2390048
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.
Hotate Kazuo
Kannou Motokatsu
Ando Electric Co. Ltd.
Goudreau Gage Dubuc
Hotate Kazuo
Kyusyu Ando Electric Company Limited
Yokogawa Electric Corporation
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