Ultrafast thulium-doped fiber laser mode-locked by antimonides

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 Sb . These saturable absorbers (SAs) were coated on tapered single mode fibers by the magnetron-sputtering deposition method. By...

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Bibliographic Details
Published in:Optics express 2021-04, Vol.29 (9), p.13722-13732
Main Authors: Shaodong, Hou, Chengjin, Lu, Haifeng, Lin, Jinzhang, Wang, Chunyu, Guo, Jianqun, Cheng, Min, Zhang, Peiguang, Yan
Format: Article
Language:English
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Summary: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 Sb . 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 Sb , 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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.421993