Open AccessEr:YAG MOPA system based on a polarization-multiplexing 4-pass structure
Author(s) -
Shanghua Li,
Chunqing Gao,
Rui Song,
Fangfang Hou,
Jing Guo,
Kaixin Wang,
Mingwei Gao
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.392023
Subject(s) - optics , multiplexing , materials science , polarization (electrochemistry) , laser , amplified spontaneous emission , laser beams , laser beam quality , optoelectronics , physics , telecommunications , chemistry , computer science
A 4-pass structure Er:YAG MOPA system at 1645 nm is theoretically and experimentally investigated. In accordance with the theoretical analysis, the 4-pass structure significantly improved the amplification performance. The highest gain is about 4 with 1 mJ incident seed energy. The power fluctuation and beam quality are improved after the amplification.