Journal
OPTICS EXPRESS
Volume 27, Issue 11, Pages 15794-15799Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.015794
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Funding
- National Key Research and Development Program of China [2018YFC1407503]
- National Natural Science Foundation of China [91833303, 11621101]
- Fundamental Research Funds for the Central Universities
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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 inn is achieved using a segment of tin-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 (similar to 45.8%) thulium-doped fiber ainplifier (TDFA). (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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