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7 March 2016 Optical refrigeration of Tm:YLF and Ho:YLF crystals
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Abstract
We report the first observation of laser cooling in 1% doped Tm:YLF by 0.5 K and in 0.8% doped Ho:YLF crystals by 0.1 K starting from room temperature in air. To achieve this, we designed and constructed a high power, broadly tunable (1735 nm-2086 nm) continuous wave singly-resonant optical parametric oscillator. (OPO). The cooling experiments were performed at ambient pressure, and temperature changes were measured using a thermal camera.
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Saeid Rostami, Alexander R. Albercht, Mohammad R. Ghasemkhani, Seth D. Melgaard, Aram Gragossian, Mauro Tonelli, and Mansoor Sheik-Bahae "Optical refrigeration of Tm:YLF and Ho:YLF crystals ", Proc. SPIE 9765, Optical and Electronic Cooling of Solids, 97650P (7 March 2016); https://doi.org/10.1117/12.2213568
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