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Pulsed pumping of semiconductor disk lasers

Hempler, N. and Hopkins, J.M. and Kemp, A. and Schulz, N. and Rattunde, M. and Wagner, J. and Dawson, M.D. and Burns, D. (2007) Pulsed pumping of semiconductor disk lasers. Optics Express, 15 (6). 3247 -3256. ISSN 1094-4087

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Abstract

Efficient operation of semiconductor disk lasers is demonstrated using uncooled and inexpensive 905nm high-power pulsed semiconductor pump lasers. Laser emission, with a peak power of 1.7W, is obtained from a 2.3μm semiconductor disk laser. This is seven times the power achieved under continuous pumping. Analysis of the time-dependent spectral characteristics of the laser demonstrate that significant device heating occurs over the 100-200ns duration of the pumping pulse - finite element modelling of the thermal processes is undertaken in support of these data. Spectral narrowing to below 0.8nm is obtained by using an intra-cavity birefringent filter.