5 April 2002 Origin of laser-induced internal cooling of Yb3+ -doped systems
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Proceedings Volume 4645, Rare-Earth-Doped Materials and Devices VI; (2002) https://doi.org/10.1117/12.461649
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States
Abstract
Laser induced internal cooling has been investigated in a new fluorochloride glass (CNBZn) and a fluoride glass (BIG) doped with 2.1x1020 Yb3+ ions/cm3 and in a Kpb2Cl5 crystal doped with 5x1019 Yb3+ by using collinear photothermal deflection and conventional laser excitation spectroscopies under high photon irradiances. The cooling efficiency for CNBZn glass which is approximately 2% relative to the absorbed laser power at 1010 nm and 300 K falls about 20% at 77 K. The cooling efficiency for BIG glass was only approximately 6% at room temperature. For the Yb3+ doped Kpb2Cl5 crystal we have shown internal laser cooling with a cooling efficiency of about 0.2% at room temperature. This is the third ytterbium-doped crystal, after Kgd(WO4) (Ref.10) and YAG (Ref.11), in which anti-Stokes laser-induced internal cooling has been demonstrated. The observed temperature dependence of the cooling process can be explained by a simple model accounting for the photon-ion- photon interaction.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joaquin R. Fernandez, Joaquin R. Fernandez, A. Mendioroz, A. Mendioroz, Rolindes Balda, Rolindes Balda, M. Voda, M. Voda, M. Al-Saleh, M. Al-Saleh, A. J. Garcia-Adeva, A. J. Garcia-Adeva, Jean-Luc Adam, Jean-Luc Adam, Jacques Lucas, Jacques Lucas, } "Origin of laser-induced internal cooling of Yb3+ -doped systems", Proc. SPIE 4645, Rare-Earth-Doped Materials and Devices VI, (5 April 2002); doi: 10.1117/12.461649; https://doi.org/10.1117/12.461649
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