Title:
CLADDING MODE LIGHT REMOVAL STRUCTURE AND LASER DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/181133
Kind Code:
A1
Abstract:
The present invention provides a cladding mode light removal structure capable of effectively removing cladding mode light while suppressing heat generation in the coating of an optical fiber. A cladding mode light removal structure 1 is provided with: an exposed cladding part 28 where a cladding 24 of an input-side optical fiber 20 is exposed; an exposed cladding part 38 where a cladding 34 of an output-side optical fiber 30 is exposed; a fusion splicing part 40 where the exposed cladding parts 28, 38 are fusion spliced; a high refractive index resin 50 having a refractive index higher than or equal to the refractive index of the cladding 24; and a low refractive index part S comprising a medium having a refractive index lower than the refractive index of the cladding 34. The high refractive index resin 50 is provided within a housing space R of a fiber housing part 10 so as to cover a downstream side end of a coating 26, the whole of the cladding 24 exposed in the exposed cladding part 28, the fusion splicing part 40, and part of the cladding 34. The low refractive index part S is located between the high refractive index resin 50 and a coating 36 of the output-side optical fiber 30 and around the output-side exposed cladding part 38.
Inventors:
KUNIYASU KENJI (JP)
MATSUMOTO RYOKICHI (JP)
MATSUMOTO RYOKICHI (JP)
Application Number:
PCT/JP2018/012044
Publication Date:
October 04, 2018
Filing Date:
March 26, 2018
Export Citation:
Assignee:
FUJIKURA LTD (JP)
International Classes:
G02B6/44; G02B6/255; H01S3/067
Foreign References:
| JP2012513612A | 2012-06-14 | |||
| JP2015014800A | 2015-01-22 | |||
| JP2007271786A | 2007-10-18 | |||
| JP2016027662A | 2016-02-18 | |||
| JP4954737B2 | 2012-06-20 |
Other References:
See also references of EP 3579033A4
Attorney, Agent or Firm:
MORI Tomohiro (JP)
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