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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 21 — Nov. 1, 2013
  • pp: 4346–4349

Blue upconversion laser based on thulium-doped silica m icrocavity

Simin Mehrabani and Andrea M. Armani  »View Author Affiliations

Optics Letters, Vol. 38, Issue 21, pp. 4346-4349 (2013)

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Whispering gallery mode optical resonant cavities fabricated from rare-earth-doped silica glasses have demonstrated lasing from the visible through the near-IR. However, achieving lasing in the blue has been elusive. In this Letter, thulium-doped silica films are synthesized and used to fabricate toroidal optical microcavities with quality factors in excess of 10 million. Despite the high phonon energy of silica, the high circulating optical intensities present in the microcavities enable upconversion of the thulium, resulting in emission in the blue and near-IR with microwatt threshold powers that scale linearly with the concentration of the thulium.

© 2013 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(160.6060) Materials : Solgel
(140.3613) Lasers and laser optics : Lasers, upconversion
(140.3948) Lasers and laser optics : Microcavity devices

ToC Category:
Lasers and Laser Optics

Original Manuscript: August 21, 2013
Revised Manuscript: September 18, 2013
Manuscript Accepted: September 23, 2013
Published: October 22, 2013

Simin Mehrabani and Andrea M. Armani, "Blue upconversion laser based on thulium-doped silica m icrocavity," Opt. Lett. 38, 4346-4349 (2013)

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