Title:
BEAM QUALITY CONTROL DEVICE AND LASER DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2021/125162
Kind Code:
A1
Abstract:
A beam quality control device (70) comprises: an optical fiber (50) having a core (51) and cladding (53); a stress-applying part (80) that is in surface contact with at least a portion of an outer peripheral surface of the optical fiber (50), and has a coefficient of thermal expansion different from that of the cladding (53); and a temperature-regulating part (90) that regulates the temperature of the stress-applying part (80). The stress-applying part (80) contracts or expands according to temperature changes effected by the temperature-regulating part (90) so that the distribution of the external force applied by the stress-applying part (80) to the cladding (53) is non-uniform in the peripheral direction of the cladding (53).
Inventors:
WANG YU (JP)
Application Number:
PCT/JP2020/046734
Publication Date:
June 24, 2021
Filing Date:
December 15, 2020
Export Citation:
Assignee:
FUJIKURA LTD (JP)
International Classes:
G02F1/01; G02B6/00; G02B6/42; G02B6/46; H01S3/067; H01S3/10; H01S3/106
Domestic Patent References:
| WO2012165389A1 | 2012-12-06 | |||
| WO2011124671A1 | 2011-10-13 | |||
| WO2018217300A1 | 2018-11-29 |
Foreign References:
| JP2015500571A | 2015-01-05 | |||
| JP2008145807A | 2008-06-26 | |||
| JP2016517636A | 2016-06-16 | |||
| JP2006078649A | 2006-03-23 | |||
| CN209709373U | 2019-11-29 | |||
| US6282341B1 | 2001-08-28 |
Attorney, Agent or Firm:
MORIMURA Yasuo (JP)
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