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Semiconductor disk laser pumped Cr2+:Znse 
lasers

Hempler, N. and Hopkins, J.M. and Rosener, B. and Rattunde, M. and Wagner, J. and Fedorov, V.V. and Moskalev, I.S. and Mirov, S.B. and Burns, D. (2009) Semiconductor disk laser pumped Cr2+:Znse 
lasers. Optics Express, 17 (20). pp. 18136-18141. ISSN 1094-4087

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Abstract

A new flexible pump source, the optically-pumped semiconductor disk laser (SDL), for the Cr2+:ZnSe laser is reported. The SDL provides up to 6W output power at a free running central wavelength of 1.98μm. The Cr2+:ZnSe laser operated at an output power of 1.8W and a slope efficiency of ~50% with respect to absorbed pump power whilst maintaining a low output intensity noise figure of <0.14% RMS. The system required no optical isolation even under the situation of significant optical feedback.