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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 9 — May. 1, 2013
  • pp: 1588–1590

Optical refrigeration to 119 K, below National Institute of Standards and Technology cryogenic temperature

Seth D. Melgaard, Denis V. Seletskiy, Alberto Di Lieto, Mauro Tonelli, and Mansoor Sheik-Bahae  »View Author Affiliations

Optics Letters, Vol. 38, Issue 9, pp. 1588-1590 (2013)

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We report on bulk optical refrigeration of Yb:YLF crystal to a temperature of 124K, starting from the ambient. This is achieved by pumping the E4-E5 Stark multiplet transition at 1020nm. A lower temperature of 119±1K (154C) with available cooling power of 18 mW is attained when the temperature of the surrounding crystal is reduced to 210 K. This result is within only a few degrees of the minimum achievable temperature of our crystal and signifies the bulk solid-state laser cooling below the National Institute of Standards and Technology (NIST)-defined cryogenic temperature of 123 K.

© 2013 Optical Society of America

OCIS Codes
(000.6850) General : Thermodynamics
(140.3320) Lasers and laser optics : Laser cooling
(160.5690) Materials : Rare-earth-doped materials
(300.1030) Spectroscopy : Absorption
(300.2530) Spectroscopy : Fluorescence, laser-induced

ToC Category:
Lasers and Laser Optics

Original Manuscript: February 20, 2013
Revised Manuscript: April 2, 2013
Manuscript Accepted: April 3, 2013
Published: May 1, 2013

Seth D. Melgaard, Denis V. Seletskiy, Alberto Di Lieto, Mauro Tonelli, and Mansoor Sheik-Bahae, "Optical refrigeration to 119 K, below National Institute of Standards and Technology cryogenic temperature," Opt. Lett. 38, 1588-1590 (2013)

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