Title:
OPTICAL MODULE AND OPTICAL UNIT
Document Type and Number:
WIPO Patent Application WO/2021/039572
Kind Code:
A1
Abstract:
An optical module 1001 comprises a first optical fiber 30, a first optical fiber collimator 10, a second optical fiber collimator 20, and a second optical fiber 40, in the order of a first direction which is the direction of a light path. The first optical fiber collimator 10 has a first core 11 and a first cladding 12 that surrounds the circumference of the first core 11. The second optical fiber collimator 20 has a second core 21 and a second cladding 22 that surrounds the circumference of the second core 21. The first optical fiber 30 has a third core 31. The second optical fiber 40 has a fourth core 41. When the core diameter of the third core 31 is smaller than the core diameter of the fourth core 41, the difference in the refractive index between the first core 11 and the first cladding 12 is larger than the difference in the refractive index between the second core 21 and the second cladding 22. When the core diameter of the third core 31 is larger than the the core diameter of the fourth core 41, the difference in the refractive index between the first core 11 and the first cladding 12 is smaller than the difference in the refractive index between the second core 21 and the second cladding 22.
Inventors:
AKASHI TOMOYOSHI (JP)
SHODA MICHIFUMI (JP)
SHODA MICHIFUMI (JP)
Application Number:
PCT/JP2020/031418
Publication Date:
March 04, 2021
Filing Date:
August 20, 2020
Export Citation:
Assignee:
KYOCERA CORP (JP)
International Classes:
G02B6/26; G02B6/32; G02B6/36
Foreign References:
| JP2002350666A | 2002-12-04 | |||
| CN102959442A | 2013-03-06 | |||
| JP2005017702A | 2005-01-20 | |||
| JP2011048268A | 2011-03-10 | |||
| JP2009109715A | 2009-05-21 | |||
| US20020186915A1 | 2002-12-12 |
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