公开(公告)号：US20210373256A1

公开(公告)日：2021-12-02

申请号：US17445216

申请日：2021-08-17

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Naoki HAYAMIZU ,  Hiroshi HASHIMOTO ,  Hideyuki NASU

IPC: G02B6/42

Abstract: An optical part includes: an optical fiber having a core portion and a cladding portion that is formed around the core portion; a light absorber placed around the optical fiber; and an adhesive member that adheres the light absorber and the optical fiber to each other. Further, the cladding portion includes: a main portion extending along a longitudinal direction and having a main portion cladding diameter; and an input end portion positioned closer to a light input side with respect to the main portion, and an input end face cladding diameter at an input end face of the input end portion is less than the main portion cladding diameter.