公开(公告)号：US20200373735A1

公开(公告)日：2020-11-26

申请号：US16991086

申请日：2020-08-12

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masayoshi NISHITA ,  Atsushi YAMAMOTO

IPC: H01S5/06 ,  H01S5/024 ,  H01S5/00 ,  H04B10/50 ,  H04B10/572 ,  H01S5/0687

Abstract: A method for controlling a wavelength of an optical module, includes: a laser light source unit emitting a laser beam; a wavelength filter having a periodical transmission characteristic with respect to a wavelength of light; a temperature controller on which the wavelength filter is placed and that adjusting a temperature of the wavelength filter; a heat generating body placed on the temperature controller; and a control device controlling the wavelength of the laser beam emitted from the laser light source unit and control the transmission characteristic of the wavelength filter based on an intensity of the laser beam transmitted through the wavelength filter, the method including changing at least one of a target value of the wavelength control of the laser beam and a target value of the control of the wavelength filter based on a current value of the heat generating body.

公开(公告)号：US20170237499A1

公开(公告)日：2017-08-17

申请号：US15432290

申请日：2017-02-14

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masayoshi NISHITA ,  Kengo MURANUSHI ,  Atsushi YAMAMOTO

IPC: H04B10/50

CPC classification number: H04B10/506 ,  H04B10/503 ,  H04B10/572 ,  H04J14/0224 ,  H04J14/0226 ,  H04J14/0227

Abstract: A method of controlling a wavelength of a wavelength tunable laser module includes: referring to data of measured frequencies and wavelength filter control values at two or more points for each basic frequency channel, the data being stored in a memory of a controller; selecting the basic frequency channel closest to a frequency of laser light that a laser light source is instructed to emit; calculating a first wavelength filter control value for providing the instructed frequency of laser light from the data of the measured frequencies allocated to the basic frequency channel closest to the instructed frequency and the wavelength filter control values; and controlling the transmission characteristic of a wavelength filter using the first wavelength filter control value.