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  • Vol. 24, Iss. 15 — Aug. 1, 1999
  • pp: 1041–1043

Laser cooling of a solid by 65K starting from room temperature

T. R. Gosnell  »View Author Affiliations


Optics Letters, Vol. 24, Issue 15, pp. 1041-1043 (1999)
http://dx.doi.org/10.1364/OL.24.001041


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Abstract

In vacuo laser cooling of a solid from 301 to 236 K has been demonstrated. The sample consists of a cladded, multimode optical fiber fabricated from the fluorozirconate glass ZBLANP; the fiber’s waveguiding core is doped with 1 wt. % Yb3+ ions. Cooling of the host glass results from anti-Stokes fluorescence of Yb3+ following optical pumping in the long-wavelength tail of the ion’s absorption spectrum (λ=1015nm) . Measurement of the time constant for equilibration of the sample temperature is in excellent agreement with an analytic calculation of this quantity.

© 1999 Optical Society of America

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

Citation
T. R. Gosnell, "Laser cooling of a solid by 65K starting from room temperature," Opt. Lett. 24, 1041-1043 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-15-1041


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References

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  8. The larger value of aeff reported in Ref. was derived from the assumption of no temperature dependence for the absorption and stimulated-emission cross sections. The more accurate expression Eq. 3 yields the value quoted here.
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