22 February 2013 A solid state ultraviolet lasers based on cerium-doped LiCaAlF6 crystal resonator
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Abstract
We report the first demonstration of a UV laser using a high-Q whispering gallery mode (WGM) resonator of Ce3+: LiCaAlF6. We show that WGM resonators from LiCaAlF6 can achieve a Q of 2.6 x 107 at UV. We demonstrated a UV laser at 290 nm with a pulsed pump laser at 266 nm. The experiments showed the low pump threshold intensity of 7.5 x 109 W/m2 and slope efficiency of 25%. We have also observed lasing delay dynamics. These results are consistent with our modeling and theoretical estimates, and pave the way for a low threshold cw UV laser using WGM resonator cavity.
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Nan Yu, Nan Yu, Thanh Le, Thanh Le, Steven J. Schowalter, Steven J. Schowalter, Wade Rellergert, Wade Rellergert, Justin Jeet, Justin Jeet, Guoping Lin, Guoping Lin, Eric Hudson, Eric Hudson, } "A solid state ultraviolet lasers based on cerium-doped LiCaAlF6 crystal resonator", Proc. SPIE 8600, Laser Resonators, Microresonators, and Beam Control XV, 86000E (22 February 2013); doi: 10.1117/12.2002657; https://doi.org/10.1117/12.2002657
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