Comparison of Peltier and anti-Stokes optical coolings

Citation
R. Frey et al., Comparison of Peltier and anti-Stokes optical coolings, J APPL PHYS, 87(9), 2000, pp. 4489-4498
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF APPLIED PHYSICS
ISSN journal
00218979 → ACNP
Volume
87
Issue
9
Year of publication
2000
Part
1
Pages
4489 - 4498
Database
ISI
SICI code
0021-8979(20000501)87:9<4489:COPAAO>2.0.ZU;2-J
Abstract
Anti-Stokes optical cooling is compared theoretically to Peltier cooling. T he influence of reabsorption of fluorescence photons, parasitic absorption, and interaction length is discussed by using a simple modeling for the pro pagation of laser and fluorescence waves. An equivalence between anti-Stoke s and Peltier coolings is presented, which shows that Peltier effect potent ially exhibits a higher cooling coefficient but much larger thermal losses than anti-Stokes fluorescence. As a consequence, Peltier coolers are shown to be more effective for heat pump and high temperature operation (T > 190 K), while anti-Stokes coolers could be used down to low cooling temperature s (around 70 K) especially if the cooling material could be operated at lon g pump wavelength. Moreover, if photons emitted at the anti-Stokes frequenc y are down converted to the laser frequency and recycled into the cooling m edium, anti-Stokes cooling could reach very high efficiencies even in the l ow temperature regime, making this technique highly attractive for cooling down of small devices. (C) 2000 American Institute of Physics. [S0021-8979( 00)02204-0].