Abstract
Strong aberrations induced inside the laser crystal under intensive diode pumping due to groundstate and excited-state absorption (ESA) limit the potential of Nd:YAG lasers.1 On the other hand, the population of higher-lying levels of 4f electron shell of Nd3+ ions (of which the most long-living is the 2(F2)5/2 level) plays an important role in the refractive-index changes of the Nd:YAG crystal.2
© 2001 EPS
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