公开(公告)号：US20220381992A1

公开(公告)日：2022-12-01

申请号：US17819027

申请日：2022-08-11

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Yoshiki NOMURA ,  Ryo KAWAHARA ,  Kyosuke YAMAUCHI ,  Shunichi MATSUSHITA ,  Kengo WATANABE

IPC: G02B6/38 ,  G01M11/00

Abstract: An optical fiber connection state determination system determines a state of connection between a first optical fiber configured to propagate a test light input from a light source and a second optical fiber in a connector configured to detachably connect an output side from which the test light is output in the first optical fiber and an input side of the second optical fiber to which the test light propagated by the first optical fiber and output from the first optical fiber is input, and includes: a measurement unit configured to measure an intensity of a reflected light reflected and propagating thorough the first optical fiber in the test light; and a determination unit configured to determine the state of connection between the first optical fiber and the second optical fiber in the connector based on the intensity measured by the measurement unit.

公开(公告)号：US20190288479A1

公开(公告)日：2019-09-19

申请号：US16433522

申请日：2019-06-06

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Ryo KAWAHARA ,  Shunichi Matsushita

IPC: H01S3/10 ,  H01S5/062 ,  H01S3/23 ,  H01S5/026

Abstract: A pulsed laser device includes a laser light source, an electro-optic modulator, a laser light source driver, an electro-optic modulator driver, and a controller to control the laser light source driver and the electro-optic modulator driver. The laser light source outputs pulsed laser light pulse-modulated by the laser light source driver. The electro-optic modulator outputs pulsed laser light obtained by causing the electro-optic modulator driver to pulse-modulate the pulsed laser light from the laser light source. The control unit controls the laser light source driver and the electro-optic modulator driver such that the electro-optic modulator turns on at least while the laser light source is on and the electro-optic modulator turns on at least once while the laser light source is off, thereby increasing a duty ratio of the pulse modulation for the electro-optic modulator relative to a duty ratio of the pulse modulation for the laser light source.