Lasing and up conversion from a nominally pure whispering gallery mode resonator

  • Mohageg M
  • Matsko A
  • Maleki L
  • 27


    Mendeley users who have this article in their library.
  • 6


    Citations of this article.


We report on the experimental observation of green and infrared light emission from a whispering gallery mode resonator fabricated with calcium fluoride, when the resonator is pumped with 795 nm light. The spectrum of light exiting the resonator caused by residual impurities contains both infrared lines corresponding to the emission pattern of Nd3+ ions and green light originating from two-photon pumping and subsequent emission of Er3+ ions. The process takes place due to the high quality factor (Q > 10(10)) of the resonator, even when the expected concentration of the extrinsic impurities approaches a part per million level. The potential for optical cooling of a monolithic solid state resonator via the upconversion phenomenon is explored theoretically. (C) 2012 Optical Society of America

Author-supplied keywords

  • caf2
  • fluoride
  • glass microsphere
  • microcavities
  • microsphere laser
  • scattering
  • stimulated-emission
  • up-conversion

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • M Mohageg

  • A B Matsko

  • L Maleki

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free