22 February 2013 A solid state ultraviolet lasers based on cerium-doped LiCaAlF6 crystal resonator
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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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