公开(公告)号：US20230144603A1

公开(公告)日：2023-05-11

申请号：US18149891

申请日：2023-01-04

Applicant: nLIGHT, Inc.

Inventor： Teemu KOKKI ,  Christopher LUETJEN ,  Ryan HAWKE

IPC: H01S3/067 ,  H01S3/16 ,  H01S3/08018 ,  G02B6/02

CPC classification number: H01S3/06733 ,  H01S3/1618 ,  H01S3/08018 ,  G02B6/02085 ,  G02B2006/0209

Abstract: Multi-clad optical fiber cladding light stripper (CLS) comprising an inner cladding with one or more recessed surface regions to remove light propagating within the inner cladding. A CLS may comprise such recessed surface regions along two or more azimuthal angles about the fiber axis, for example to improve stripping efficiency. One or more dimensions, or spatial distribution, of the recessed surface regions may be randomized, for example to improve stripping uniformity across a multiplicity of modes propagating within a cladding. Adjacent recessed surface regions may abut, for example, end-to-end, as segments of a recess that occupies a majority, or even an entirety, of the length of a fiber surrounded by a heat sink. One or more dimensions, or angular position, of individual ones of the abutted recessed surface regions may vary, according to a regular or irregular pattern.