An efficient internally frequency-doubled mode-locked Nd:YAG laser has been operated. An interaction between the intracavity harmonic generation and mode locking, which results in a lengthening of the mode-locked pulse and a corresponding decrease in fundamental circulating power, has been observed with this laser. The laser makes use of an intracavity harmonic mirror to produce 1.5 W of 0.53-μ power in the output beam. A significant decrease in laser noise is observed when the laser is mode locked.
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Hitz et al. (1971) studied this question.
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