Abstract
The possibility of using direct pumping into the emitting level of the ion in magnesium-compensated strontium lanthanum aluminate to improve laser emission is discussed. Selection of the composition parameters x and y for optimization of laser emission and reduction of heat generation is based on the spectroscopic and crystal growth characteristics. Pumping in the absorption band transforms the laser process into a quasi-two-level scheme of very low (below 4%) quantum defects. A very high slope efficiency (over 84%) for continuous-wave laser emission is demonstrated with Ti:sapphire laser pumping in this band for a crystal with and .
© 2006 Optical Society of America
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