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Patent Searching and Data


Title:
LASER MODULE AND LASER DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/187399
Kind Code:
A1
Abstract:
Provided is a laser module capable of accurately detecting a malfunction in the module with a small number of temperature measuring elements. The laser module 1 is equipped with semiconductor laser element groups 23, 33. Laser lights L1, L2 emitted from the semiconductor laser element groups 23, 33 include a TE mode (main polarization) and a TM mode (minor polarization). In addition, the laser module 1 comprises: a package casing 10; a beam splitter 50; and an optical fiber 60 optically coupled to, and outputting to the exterior, a multiplexed main polarization light L3 split by the beam splitter 50. Provided on the inner wall of the package casing 10 is a minor polarization irradiation region 17 that is irradiated by a multiplexed minor polarization light L4 split by the beam splitter 50. Mounted on the package casing 10 is a thermistor 90 detecting a change in the temperature of the minor polarization irradiation region 17.

Inventors:
KASAI Yohei (Sakura Works 1440, Mutsuzaki, Sakura-sh, Chiba 50, 〒2858550, JP)
Application Number:
JP2018/046492
Publication Date:
October 03, 2019
Filing Date:
December 18, 2018
Export Citation:
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Assignee:
FUJIKURA LTD. (5-1 Kiba 1-chome, Koto-ku Tokyo, 12, 〒1358512, JP)
International Classes:
H01S5/022
Domestic Patent References:
WO2016194556A12016-12-08
Foreign References:
JPH07302948A1995-11-14
JP2011523198A2011-08-04
JP2017092206A2017-05-25
JP2018006713A2018-01-11
US20090299693A12009-12-03
Attorney, Agent or Firm:
MORI Tomohiro (APERIO IP ATTORNEYS, MIII Bldg. 6F 1-17-1 Uchikanda, Chiyoda-k, Tokyo 47, 〒1010047, JP)
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