镱镥钇铝石榴石中寄生损耗的识别以及降至80K的光制冷前景。

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

作者信息

Melgaard Seth, Seletskiy Denis, Polyak Victor, Asmerom Yemane, Sheik-Bahae Mansoor

出版信息

Opt Express. 2014 Apr 7;22(7):7756-64. doi: 10.1364/OE.22.007756.

DOI:10.1364/OE.22.007756

Abstract

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.

摘要

通过光学光谱和质谱对Yb:YLF低温冷却器中Yb掺杂浓度进行的系统研究已确定铁离子是背景吸收的主要来源。观察到寄生吸收随Yb掺杂而降低，从而将10% Yb:YLF样品光学冷却至114K±1K，室温冷却功率为750 mW，计算得出的最低可实现温度为93K。