Abstract

The possibility of using direct pumping into the emitting level of the Nd3+ ion in magnesium-compensated strontium lanthanum aluminate (Sr1xLaxyNdyMgxAl12xO19) to improve 900nm F324I924 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 865.5nm absorption band I924(Z1)F324(R1) 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 901nm continuous-wave laser emission is demonstrated with Ti:sapphire laser pumping in this band for a crystal with x=0.4 and y=0.05.

© 2006 Optical Society of America

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