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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 23 — Dec. 1, 2012
  • pp: 4961–4963

Low-threshold ultraviolet solid-state laser based on a Ce3+:LiCaAlF6 crystal resonator

Thanh Le, Steven J. Schowalter, Wade Rellergert, Justin Jeet, Guoping Lin, Nan Yu, and Eric R. Hudson  »View Author Affiliations

Optics Letters, Vol. 37, Issue 23, pp. 4961-4963 (2012)

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A low-threshold solid-state UV laser using a whispering gallery mode (WGM) resonator constructed from UV transparent crystalline material is demonstrated. Using a Ce3+:LiCaAlF6 resonator, we observe broad bandwidth lasing (280–330 nm) with a low threshold intensity of 7.5×109W/m2 and an effective slope efficiency of 25%. The lasing time delay dynamics in the pulsed operation mode are also observed and analyzed. Additionally, a LiCaAlF6 WGM resonator with Q=2×107 at 370 nm is realized. The combination of this high Q and the small WGM mode volume significantly lowers the pump power threshold compared to traditional cavity designs, opening the door for both tunable continuous-wave and mode-locked operation.

© 2012 Optical Society of America

OCIS Codes
(140.3410) Lasers and laser optics : Laser resonators
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.3610) Lasers and laser optics : Lasers, ultraviolet
(140.4780) Lasers and laser optics : Optical resonators
(140.3945) Lasers and laser optics : Microcavities
(140.3948) Lasers and laser optics : Microcavity devices

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 15, 2012
Manuscript Accepted: October 16, 2012
Published: November 28, 2012

Thanh Le, Steven J. Schowalter, Wade Rellergert, Justin Jeet, Guoping Lin, Nan Yu, and Eric R. Hudson, "Low-threshold ultraviolet solid-state laser based on a Ce3+:LiCaAlF6 crystal resonator," Opt. Lett. 37, 4961-4963 (2012)

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