Open Access400 mW narrow linewidth single-frequency fiber ring cavity laser in 2 um waveband
Author(s) -
Taoce Yin,
Yufu Song,
Xiaogang Jiang,
Feihong Chen,
Sailing He
Publication year - 2019
Publication title -
optics express
Language(s) - German
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.015794
Subject(s) - laser linewidth , thulium , materials science , optics , fiber laser , lasing threshold , slope efficiency , laser , optical fiber , dispersion shifted fiber , polarization maintaining optical fiber , bandwidth (computing) , optoelectronics , doping , fiber optic sensor , physics , telecommunications , computer science
We present a single-frequency thulium-doped fiber laser (TDFL) with a narrow linewidth of 20 kHz. Stable single-longitudinal-mode (SLM) lasing operation at 1957 nm is achieved using a segment of un-pumped polarization-maintaining thulium-doped fiber (PM-TDF) as an ultra-narrow bandwidth filter. A high optical signal-to-noise ratio (OSNR) of over 60 dB is obtained and a high power of over 400 mW is achieved with a high slope-efficiency (~45.8%) thulium-doped fiber amplifier (TDFA).