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Pulse-pumped operation of divalent transition-metal lasers

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1 Author(s)
Moulton, P.F. ; Massachusetts Institute of Technology, Lexington, MA, USA

The pulse-pumped operating characteristics of liquid-nitrogen-cooled Ni:MgF2, Co:MgF2, and Ni:CaY2Mg2Ge3O12(CAMGAR) solid-state lasers have been studied. The internal quantum efficiency of the Ni:MgF2laser was found to be limited to approximately 40 percent, presumably because of excited-state absorption. The Co:MgF2laser operated with near-unity quantum efficiency, and generated 150 mJ of diffraction-limited output at repetition rates up to 50 Hz. A continuous tuning range from 1.6 to 2.3 μm was observed along withQ-switched peak output powers of 80 kW. Laser operation from the garnet-structured crystal Ni:CAMGAR was obtained at a wavelength of 1.46 μm.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:18 ,  Issue: 8 )