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Identification of parasitic losses in Yb:YLF and prospects for optical refrigeration down to 80K

2014; Optica Publishing Group; Volume: 22; Issue: 7 Linguagem: Inglês

10.1364/oe.22.007756

1094-4087

Seth D. Melgaard, Denis V. Seletskiy, Victor J. Polyak, Yemane Asmerom, Mansoor Sheik‐Bahae,

Cold Atom Physics and Bose-Einstein Condensates

Systematic study of Yb doping concentration in the Yb:YLF cryocoolers by means of optical and mass spectroscopies has identified iron ions as the main source of the background absorption.Parasitic absorption was observed to decrease with Yb doping, resulting in optical cooling of a 10% Yb:YLF sample to 114K ± 1K, with room temperature cooling power of 750 mW and calculated minimum achievable temperature of 93 K.