Title:
OPTICAL MODULE
Document Type and Number:
WIPO Patent Application WO/2023/145764
Kind Code:
A1
Abstract:
An optical module according to one aspect of the present invention comprises: a semiconductor laser element; a plurality of optical filters having periodic transmission characteristics in terms of the frequency of the light, and that respectively transmit, at transmittances corresponding to the transmission characteristics, a plurality of branched laser beams, which are one portion of laser beams output by the semiconductor laser element; and a plurality of temperature adjusters respectively adjusting the temperatures of the plurality of optical filters to be mutually different temperatures. The transmission characteristics of the plurality of optical filters are adjusted such that the phases are made to differ from each other by adjusting the temperatures of the plurality of optical filters by means of the plurality of temperature adjusters. Wavelength lock control of the semiconductor laser element is performed on the basis of the intensity of a portion of the laser beams, and the intensity of the plurality of branched laser beams transmitted through the respective optical filters after temperature adjustment.
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Inventors:
YAMAOKA KAZUKI (JP)
ARIGA MAIKO (JP)
ARIGA MAIKO (JP)
Application Number:
PCT/JP2023/002217
Publication Date:
August 03, 2023
Filing Date:
January 25, 2023
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
H01S5/0687; H01S5/024; H01S5/026
Foreign References:
| JP2015060961A | 2015-03-30 | |||
| JP2013161825A | 2013-08-19 | |||
| JP2017175030A | 2017-09-28 | |||
| JP2004101935A | 2004-04-02 | |||
| JP2016162828A | 2016-09-05 | |||
| JP2015068854A | 2015-04-13 | |||
| US20070230855A1 | 2007-10-04 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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