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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 21 — Oct. 21, 2013
  • pp: 24711–24720

Laser-induced cooling of a Yb:YAG crystal in air at atmospheric pressure

Elton Soares de Lima Filho, Galina Nemova, Sébastien Loranger, and Raman Kashyap  »View Author Affiliations

Optics Express, Vol. 21, Issue 21, pp. 24711-24720 (2013)

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We report for the first time the experimental demonstration of optical cooling of a bulk crystal at atmospheric pressure. The use of a fiber Bragg grating (FBG) sensor to measure laser-induced cooling in real time is also demonstrated for the first time. A temperature drop of 8.8 K from the chamber temperature was observed in a Yb:YAG crystal in air when pumped with 4.2 W at 1029 nm. A background absorption of 2.9 × 10−4 cm−1 was estimated with a pump wavelength at 1550 nm. Simulations predict further cooling if the pump power is optimized for the sample’s dimensions.

© 2013 Optical Society of America

OCIS Codes
(140.3320) Lasers and laser optics : Laser cooling
(140.6810) Lasers and laser optics : Thermal effects
(160.5690) Materials : Rare-earth-doped materials

ToC Category:
Lasers and Laser Optics

Original Manuscript: August 14, 2013
Revised Manuscript: October 1, 2013
Manuscript Accepted: October 1, 2013
Published: October 8, 2013

Elton Soares de Lima Filho, Galina Nemova, Sébastien Loranger, and Raman Kashyap, "Laser-induced cooling of a Yb:YAG crystal in air at atmospheric pressure," Opt. Express 21, 24711-24720 (2013)

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