Abstract

The direct and indirect pumping could be used to excite Nd3+-activated crystals effectively. The advantage of direct pumping is the reduction of heat load, and the shortage is the low absorption of pump power. They are the contrary factors affecting the laser performance; hence, the direct pumping is not always better than indirect pumping. To compare the laser performance under direct pumping with that under indirect pumping, the self-frequency-doubling laser model that takes the heat load into account is developed, and the model is applied to the case of Nd3+:YAB crystal. For the typical experimental parameters, we derive the criteria to judge the preferential pumping for the given crystal.

© 2012 Optical Society of America

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