Tm-doped crystals for mid-IR optical cryocoolers and radiation balanced lasers

被引：17
|
作者：
Rostami, Saeid [1 ]
Albrecht, Alexander R. [1 ]
Volpi, Azzurra [1 ]
Hehlen, Markus P. [1 ,2 ]
Tonelli, Mauro [3 ]
Sheik-Bahae, Mansoor [1 ]
机构：
[1] Univ New Mexico, Dept Phys & Astron, 1919 Lomas Blvd NE,MSC 07-4220, Albuquerque, NM 87131 USA
[2] Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA
[3] Univ Pisa, NEST CNR, Dipartimento Fis, Largo B Pontecorvo 3, I-56127 Pisa, Italy
来源：
OPTICS LETTERS | 2019年 / 44卷 / 06期
关键词：
D O I：
10.1364/OL.44.001419
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report the complete characterization of various cooling-grade Tm-doped crystals including, to the best of our knowledge, the first demonstration of optical refrigeration in Tm:YLF crystals. Room temperature laser cooling efficiencies of 1% and 2% (mol) Tm:YLF and 1% Tm:BYF crystals at different excitation polarizations are measured, and their external quantum efficiency and background absorption are extracted. By performing detailed low-temperature spectroscopic analysis of the samples, global minimum achievable temperatures of 160 to 110 K are estimated. The potential of Tm-doped crystals to realize mid-IR optical cryocoolers and radiation balanced lasers (RBIs) in the eye-safe region of the spectrum is discussed, and a promising two-tone RBL in a tandem structure of Tm:YLF and Ho:YLF crystals is proposed. (C) 2019 Optical Society of America
引用
收藏
页码：1419 / 1422
页数：4
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