Open AccessUltrafast thulium-doped fiber laser mode-locked by antimonides
Author(s) -
Shangguo Hou,
Chengjin Lu,
Haifeng Lin,
Jinzhang Wang,
Chunyu Guo,
Jing Cheng,
Min Zhang,
Peiguang Yan
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.421993
Subject(s) - ultrashort pulse , materials science , thulium , fiber laser , optics , optoelectronics , laser , saturable absorption , mode locking , sputter deposition , doping , pulse duration , photonics , sputtering , thin film , nanotechnology , physics , wavelength
We report, for the first time, the nonlinear absorption at the 2 µm waveband of three Sb-related materials including two Sb compounds, GaSb and InSb, and one Sb alloy, Ge 8 Sb 92 . These saturable absorbers (SAs) were coated on tapered single mode fibers by the magnetron-sputtering deposition method. By incorporating these SAs into Tm-doped fiber lasers, ultrafast mode-locked solitons could be readily obtained. Stable pulse trains with 922 fs/753 fs/1005 fs pulse durations, 31.35 mW/37.70 mW/16.60 mW output powers, 93 dB/80 dB/92 dB signal-to-noise ratios were achieved with GaSb/InSb/Ge 8 Sb 92 , respectively. Our findings demonstrate that these materials can be widely used for photonic devices in the 2 µm waveband where ultrafast optical switching and modulating are desired.