Open AccessPower scaling and spectral linewidth suppression of hybrid Brillouin/thulium fiber laser
Author(s) -
Chaodu Shi,
Quan Sheng,
Shijie Fu,
Shuai Sun,
Junxiang Zhang,
Wei Shi,
Jianquan Yao
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.379013
Subject(s) - laser linewidth , brillouin scattering , optics , materials science , fiber laser , brillouin zone , thulium , laser power scaling , laser , optoelectronics , physics
In this paper, an ultra-narrow linewidth hybrid Brillouin/thulium fiber laser (BTFL) was demonstrated. By optimizing the output coupling, pump scheme, fiber length and Brillouin pump power for the linewidth narrowing, 344-mW output power with a narrow linewidth of 0.93 kHz was obtained from the BTFL, in which the linewidth of Stokes light was suppressed more than 43 times compared with the 40 kHz linewidth of the Brillouin pump. Besides, the influences of output coupling and pump scheme on the power and linewidth behavior of a single-frequency BTFL were also experimentally investigated, and there exists a performance balance among linewidth narrowing, output power and SBS threshold. The output coupling exerted a significant influence on the BTFL performance.