26 May 2011 High efficiency Yb:YAG thin disk laser at room and cryogenic temperatures
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Proceedings Volume 8039, Laser Technology for Defense and Security VII; 80390A (2011); doi: 10.1117/12.891910
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States
Abstract
Yb:YAG thin-disk laser performance at room and cryogenic (80K) temperatures is presented. The Yb:YAG gain media, which is Indium soldered to specialized CuW mounting caps, is cooled using either a pressurized R134A refrigerant system or by a two-phase liquid nitrogen spray boiler. At cryogenic temperatures spontaneous emission measurements reveal sharper transition lines and a decrease in the fluorescence lifetime. Lasing reflects that a true four-level laser. Interchangeable mounting caps allow the same Yb:YAG media to be switched between the two systems. This allows direct comparison of lasing, amplified spontaneous emission, and temperature performance at 15 °C and at -200 oC.
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T. Carson, N. Vretenar, T. C. Newell, P. Peterson, T. Lucas, W. P. Latham, "High efficiency Yb:YAG thin disk laser at room and cryogenic temperatures", Proc. SPIE 8039, Laser Technology for Defense and Security VII, 80390A (26 May 2011); doi: 10.1117/12.891910; https://doi.org/10.1117/12.891910
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KEYWORDS
Cryogenics

YAG lasers

Absorption

Crystals

Ceramics

Indium

Luminescence

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