Cryogenic Yb: YAG Thin-Disk Laser
Journal Article,01 Aug 2011,01 Aug 2011
University of New Mexico Albuquerque United States
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At cryogenic temperatures, YbYAG behaves as a 4-level laser. Its absorption and emission cross-sections increase, and its thermal conductivity improves. YbYAG thin disk laser performance at room and cryogenic 80 deg. K temperatures will be presented. The YbYAG gain media is cooled using either a pressurized R134A refrigerant system or by a two-phase liquid nitrogen spray boiler. Interchangeable mounting caps allow the same YbYAG media to be switched between the two systems. This allows direct comparison of lasing, amplified spontaneous emission, and temperature performance between 20 deg. C and -200 deg. C.