7 March 2007 Differential luminescence thermometry in laser cooling of solids
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We have developed a non-contact spectroscopic technique to measure the temperature change of Thulium-doped glasses and crystals with high precision. The approach makes use of temperature-dependent broadening of various peaks in the luminescence spectra. A weak, cw probe laser excites the sample in vacuum. The luminescence spectrum is collected by a fiber and routed to a high-resolution spectrometer. We have demonstrated temperature resolution of 62 mK in Tm:BaY2F8.
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W. Patterson, W. Patterson, E. Soto, E. Soto, M. Fleharty, M. Fleharty, M. Sheik-Bahae, M. Sheik-Bahae, } "Differential luminescence thermometry in laser cooling of solids", Proc. SPIE 6461, Laser Cooling of Solids, 64610B (7 March 2007); doi: 10.1117/12.710004; https://doi.org/10.1117/12.710004

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