Progress towards cryogenic temperatures in intra-cavity optical refrigeration using a VECSEL

Alexander R. Albrecht; Mohammadreza Ghasemkhani; Jeffrey G. Cederberg; Denis V. Seletskiy; Seth D. Melgaard; Mansoor Sheik-Bahae

doi:10.1117/12.2005098

11 March 2013 Progress towards cryogenic temperatures in intra-cavity optical refrigeration using a VECSEL

Alexander R. Albrecht, Mohammadreza Ghasemkhani, Jeffrey G. Cederberg, Denis V. Seletskiy, Seth D. Melgaard, Mansoor Sheik-Bahae

Author Affiliations +

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.

Citation Download Citation

Alexander R. Albrecht, Mohammadreza Ghasemkhani, Jeffrey G. Cederberg, Denis V. Seletskiy, Seth D. Melgaard, and 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); https://doi.org/10.1117/12.2005098

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