7 March 2016 Optical refrigeration of Tm:YLF and Ho:YLF crystals
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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, Saeid Rostami, Alexander R. Albercht, Alexander R. Albercht, Mohammad R. Ghasemkhani, Mohammad R. Ghasemkhani, Seth D. Melgaard, Seth D. Melgaard, Aram Gragossian, Aram Gragossian, Mauro Tonelli, Mauro Tonelli, Mansoor Sheik-Bahae, 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); doi: 10.1117/12.2213568; https://doi.org/10.1117/12.2213568


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