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Patent Searching and Data


Title:
PHOTODETECTOR DEVICE AND LASER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/189317
Kind Code:
A1
Abstract:
The present invention provides a photodetector device capable of detecting, with high accuracy, laser light which propagates through an optical fiber core. A photodetector device 30 comprises an optical fiber 34 which includes a core 40, an inner cladding 41 having a refractive index lower than the refractive index of the core 40, and an outer cladding 43 having a refractive index which is equal to or less than the refractive index of the inner cladding 41. The photodetector device 30 further comprises: a photodetector 60 which is disposed in a photodetector region 51 of the optical fiber 34 and detects the laser light which propagates through the core 40 of the optical fiber 34; an upstream light removal unit 71 which, in an upstream light removal region 52 positioned upstream of the photodetector region 51 of the optical fiber 34, removes at least a portion L1 of residual light which propagates through the outside of the core 40 of the optical fiber 34; and a downstream light removal unit 72 which, in a downstream light removal region 53 positioned downstream of the photodetector region 51 of the optical fiber 34, removes at least a portion L2 of reflected light which propagates through the outside of the core 40 of the optical fiber 34.

Inventors:
HIDAKA Hikaru (Sakura Works 1440, Mutsuzak, Sakura-shi Chiba 50, 〒2858550, JP)
Application Number:
JP2019/013105
Publication Date:
October 03, 2019
Filing Date:
March 27, 2019
Export Citation:
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Assignee:
FUJIKURA LTD. (5-1 Kiba 1-chome, Koto-ku Tokyo, 12, 〒1358512, JP)
International Classes:
H01S3/00; G01J1/02; G02B6/02; G02B6/036; G02B6/44; H01S3/067
Foreign References:
JP2016161867A2016-09-05
JP2017116465A2017-06-29
JP2017021099A2017-01-26
CN204116642U2015-01-21
US20140363125A12014-12-11
US20140313513A12014-10-23
JP2012014173A2012-01-19
US20070217738A12007-09-20
JPH04291213A1992-10-15
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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