LASER PROCESSING APPARATUS AND COUPLER
    2.
    发明公开

    公开(公告)号:US20230411922A1

    公开(公告)日:2023-12-21

    申请号:US18363030

    申请日:2023-08-01

    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.

    OPTICAL COUPLER AND LIGHT OUTPUT DEVICE

    公开(公告)号:US20220413219A1

    公开(公告)日:2022-12-29

    申请号:US17894478

    申请日:2022-08-24

    Inventor: Kohei KAWASAKI

    Abstract: An optical coupler includes: input-type optical fibers; an output-type optical fiber; and radiant light processing units. The input-type optical fibers are bundled at leading end side to form a fiber bundle portion, and leading end portion of the fiber bundle portion is connected to the output-type optical fiber. In at least either the input-type optical fibers or the output-type optical fiber, a tapered portion is formed in which cross-sectional area is tapered to become narrower in light traveling direction indicating direction from the input-type optical fibers toward the output-type optical fiber. The number of the tapered portion is equal to or greater than two. Each radiant light processing unit is disposed to mutually overlap with one of the tapered portions or away from one of the tapered portions in the light traveling direction, and is disposed on outer periphery of the input-type optical fibers or the output-type optical fiber.

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