Over the past few years, significant enhancements in lasing efficiency have been well established using chromium sensitizers in neodymium-doped garnets. In particular, Cr:Nd:GSGG has drawn much attention recently because of its ~200% pumping efficiency improvement relative to that of Nd:YAG.1 Moreover, these gallium garnet crystals are capable of coreless boule growth and hence provide relatively large usable diameters of ~10 cm for large scale solid state laser design. However, one characteristic aspect of these gallium garnets is their reduced thermal conductivity. This results in increased effects of heat loading and requires special attention in high average power laser designs.

© 1989 Optical Society of America

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