Invention Grant
- Patent Title: Optical power monitoring device, laser device, and laser system
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Application No.: US16301677Application Date: 2017-02-22
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Publication No.: US10658809B2Publication Date: 2020-05-19
- Inventor: Yoshitaka Yokoyama
- Applicant: FUJIKURA LTD.
- Applicant Address: JP Tokyo
- Assignee: Fujikura Ltd.
- Current Assignee: Fujikura Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Osha Liang LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@42917114
- International Application: PCT/JP2017/006624 WO 20170222
- International Announcement: WO2017/199508 WO 20171123
- Main IPC: H01S3/06
- IPC: H01S3/06 ; H01S3/067 ; G01J1/04 ; G01J1/42 ; G01J1/44 ; G01J1/02 ; H01S3/00

Abstract:
An optical power monitoring device that monitors power of input light reflected back into an optical fiber among output light output from the optical fiber, the optical power monitoring device includes: a photodetector disposed by the optical fiber that detects Rayleigh scattered light generated by the input light and the output light that are guided by the optical fiber; and a calculator that performs a calculation to exclude a component that corresponds to an output of the output light detected by the photodetector using first information that indicates a relationship between an output of the output light obtained in advance under a condition where the output light is not reflected and the output of the output light detected by the photodetector.
Public/Granted literature
- US20190296515A1 OPTICAL POWER MONITORING DEVICE, LASER DEVICE, AND LASER SYSTEM Public/Granted day:2019-09-26
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