公开(公告)号：US20230411922A1

公开(公告)日：2023-12-21

申请号：US18363030

申请日：2023-08-01

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kohei KAWASAKI ,  Hajime MORI ,  Taisuke ATSUMI

IPC: H01S3/067 ,  G02B6/28 ,  G02B6/02

CPC classification number: H01S3/06783 ,  G02B6/02042 ,  G02B6/2856

Abstract: A laser processing apparatus includes: at least two first input optical fibers; an output optical fiber; a coupler configured to optically couple a first end of a bundle portion, in which the at least two first input optical fibers are bundled, to a second end of the output optical fiber; at least one first light source optically connected to one of the first input optical fibers to output laser light; and an optical head optically connected to the output optical fiber to output laser light and passing through the first input optical fiber and the output optical fiber. In a cross section intersecting an axial direction of the first end, a cladding of the first input optical fiber has an extending portion extending linearly in a direction intersecting the axial direction between cores of two first input optical fibers adjacent in a circumferential direction.