A new class of intermediate-gain laser materials for rare-earth ions, based upon the principle of inhomogeneous broadening of spectral lines in mixed-compound crystals, is reported. Spectroscopic evidence for Nd in YAl0.6Ga0.4G mixed garnets is presented which shows a cross-section reduction of 3.3 compared to Nd in YAlG. Other physical properties of the mixed garnets, in particular the thermal conductivity, are not degraded; consequently, the Nd-doped mixed garnet materials may prove important for increased-energy/pulse high-average-power Q-switched laser applications.
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Riseberg et al. (1973) studied this question.
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