OPTICAL FIBER CHARACTERISTICS MEASUREMENT DEVICE AND METHOD

WIPO Patent Application WO/2012/105429

A1

Provided is an optical fiber characteristics measurement device that is provided with: a light source for emitting laser light modulated by a specified modulation frequency; an incident means for receiving the laser light from the light source as continuous light and pulse light from one end and the other end of an optical fiber, respectively; and a light detector for detecting light emitted from the optical fiber, the optical fiber characteristics measurement device measuring the characteristics of the optical fiber using the detection results of the light detector, wherein the optical fiber characteristics measurement device is characterized in being provided with a synchronous detector that extracts, from among the detection signals output from the light detector, detection signals obtained by detecting the light in the vicinity of a measurement point set in the optical fiber, and synchronously detects the extracted detection signals using a synchronization signal having a specified period.

WO/2020/006427	TIME-SPACE DE-NOISING FOR DISTRIBUTED SENSORS
JPS5629116	MEASUREMENT UNIT FOR MOVING DISTANCE
WO/2012/137022	FIBRE OPTIC DISTRIBUTED SENSING

KISHI MASATO (JP)
HOTATE KAZUO (JP)
YARI TAKASHI (JP)
KUMAGAI YOSHIHIRO (JP)

PCT/JP2012/051754

August 09, 2012

January 27, 2012

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UNIV TOKYO (JP)
MITSUBISHI HEAVY IND LTD (JP)
YOKOGAWA ELECTRIC CORP (JP)
KISHI MASATO (JP)
HOTATE KAZUO (JP)
YARI TAKASHI (JP)
KUMAGAI YOSHIHIRO (JP)

G01D5/353; G01L1/24; G01M11/00

JP2009198300A	2009-09-03
JP2007155409A	2007-06-21
JP2005147909A	2005-06-09
JP2003322589A	2003-11-14
JP3667132B2	2005-07-06
JP3607930B2	2005-01-05

See also references of EP 2672235A4

SHIGA Masatake et al. (JP)
Masatake Shiga (JP)

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