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Title:
OPTICAL COUPLER AND OPTICAL OUTPUT DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/172226
Kind Code:
A1
Abstract:
An optical coupler (20A) comprises: a plurality of input optical fibers (21); an optical output fiber (22); and two or more emitted light processing sections (12a, 23b). The plurality of input optical fibers (21) are bundled at the distal end side thereof so as to constitute bundled sections (21A, 21B, 21C, 21D). A distal end section (21D) of the bundled sections (21A, 21B, 21C, 21D) is connected to the output optical fiber (22). The plurality of input optical fibers (21) and/or the output optical fiber (22) is provided with tapered sections (21B, 21D) which are tapered such that the cross-section area decreases in a light advancing direction from the plurality of input optical fibers (21) toward the output optical fiber (22). The number of the tapered sections (21B, 21D) is two or more. The two or more emitted light processing sections (12a, 23b) are provided so as to overlap with the respective two or more tapered sections (21B, 21D) on the light advancing direction side, or to be spaced apart therefrom toward the light advancing direction side. Further, the two or more emitted light processing sections (12a, 23b) are provided on the outer periphery of the plurality of input optical fibers (21) or the output optical fiber (22).

Inventors:
KAWASAKI KOHEI (JP)
Application Number:
PCT/JP2021/006463
Publication Date:
September 02, 2021
Filing Date:
February 19, 2021
Export Citation:
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Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
G02B6/04; G02B6/26; H01S3/00; H01S3/23
Foreign References:
US20170017036A12017-01-19
JP2019219349A2019-12-26
US20090231682A12009-09-17
JP2015034942A2015-02-19
US20080050069A12008-02-28
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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