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Optics Letters

Optics Letters

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  • Vol. 23, Iss. 8 — Apr. 15, 1998
  • pp: 639–641

Laser cooling of a solid by 21K starting from room temperature

X. Luo, M. D. Eisaman, and T. R. Gosnell  »View Author Affiliations


Optics Letters, Vol. 23, Issue 8, pp. 639-641 (1998)
http://dx.doi.org/10.1364/OL.23.000639


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Abstract

A fluorozirconate glass doped with trivalent ytterbium ions has been laser cooled in vacuo from 298 to 277 K by optical pumping of the ions at 1015 nm. The cooling effect arises from anti-Stokes fluorescence of the laser-excited ions and by virtue of the near-unit fluorescence quantum efficiency for Yb3+ in sufficiently pure solid hosts. The sample temperatures in the experiment are determined by measurement of the Yb3+ emission spectrum; the value of the observed temperature change from room temperature as a function of pump wavelength is successfully explained in terms of a simple two-level model that includes the effect of optical saturation.

© 1998 Optical Society of America

OCIS Codes
(120.6780) Instrumentation, measurement, and metrology : Temperature
(140.3320) Lasers and laser optics : Laser cooling

Citation
X. Luo, M. D. Eisaman, and T. R. Gosnell, "Laser cooling of a solid by 21K starting from room temperature," Opt. Lett. 23, 639-641 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-8-639

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