Journal
OPTICS AND LASER TECHNOLOGY
Volume 116, Issue -, Pages 112-116Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2019.03.025
Keywords
Diode-pumped solid-state lasers; Visible lasers; Single-longitudinal-mode
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Funding
- NSAF [U1830123]
- National Natural Science Foundation of China [61805119]
- National Natural Science Foundation of Jiangsu Province for Youth [BK20180460]
- Fundamental Research Funds for the Central Universities [30916011103]
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A diode-pumped solid-state laser directly emitting continuous-wave (cw), single-longitudinal mode (SLM) output at 640-nm with a c-cut praseodymium-doped yttrium lithium fluoride (Pr:YLF) crystal was demonstrated for the first time, to the best of our knowledge. Combining two quarter-wave plates (QWPs) and one Brewster plate to form a twisted-mode cavity, this SLM solid-state laser achieved a maximum cw output power of 403 mW with a threshold of 600 mW and a slope efficiency of 26.8%. The emission spectrum had a linewidth of 150 MHz. The single-mode beam quality (M-2) was 1.10 and 1.07 along the x and y direction, respectively.
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