11 March 2013 Progress towards cryogenic temperatures in intra-cavity optical refrigeration using a VECSEL
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Proceedings Volume 8638, Laser Refrigeration of Solids VI; 863805 (2013) https://doi.org/10.1117/12.2005098
Event: SPIE OPTO, 2013, San Francisco, California, United States
Abstract
We report on the use of a high power InGaAs quantum well vertical external-cavity surface-emitting laser (VECSEL) emitting at a wavelength of 1020 nm for intra-cavity cooling of a 5% Yb-doped YLF crystal to 148 K from room temperature. Similar crystals have now reached temperatures below the NIST-defined cryogenic temperature of 123 K when pumped outside a laser cavity. We discuss the progress, advantages, and challenges of laser cooling inside a VECSEL cavity, including the VECSEL active region design, cavity design, and cooling sample choice for optimal cooling.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexander R. Albrecht, Alexander R. Albrecht, Mohammadreza Ghasemkhani, Mohammadreza Ghasemkhani, Jeffrey G. Cederberg, Jeffrey G. Cederberg, Denis V. Seletskiy, Denis V. Seletskiy, Seth D. Melgaard, Seth D. Melgaard, Mansoor Sheik-Bahae, Mansoor Sheik-Bahae, } "Progress towards cryogenic temperatures in intra-cavity optical refrigeration using a VECSEL", Proc. SPIE 8638, Laser Refrigeration of Solids VI, 863805 (11 March 2013); doi: 10.1117/12.2005098; https://doi.org/10.1117/12.2005098
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