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1. (WO2018143284) FIBER LASER, SUPPLY METHOD, AND MANUFACTURING METHOD

Pub. No.:    WO/2018/143284    International Application No.:    PCT/JP2018/003244
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Thu Feb 01 00:59:59 CET 2018
IPC: H01S 3/067
H01S 3/0941
H01S 3/102
Applicants: FUJIKURA LTD.
株式会社フジクラ
Inventors: NGUYEN, Huy Khanh
グェン フイ カン
Title: FIBER LASER, SUPPLY METHOD, AND MANUFACTURING METHOD
Abstract:
The present invention reduces the power of Stokes light generated through an amplification optical fiber, without reducing the power of a laser beam outputted from the amplification optical fiber in a bidirectional excitation-type fiber laser. The power (PB) of back excitation light inputted to an amplification optical fiber (AF) via a low-reflecting fiber black grating (FBG2) is set larger than the power (PF) of front excitation light inputted to the amplification optical fiber (AF) via a high-reflecting fiber black grating (FBG2).