Abstract

Using a 1W laser diode pump, Nd:YAG and Nd:YLF lasers have been passively mode-locked using a coupled nonlinear external cavity, to give a stable train of pulses. Pulsewidths as short as 2.0ps have been achieved in Nd:YAG, and 1.4ps in Nd:YLF, with average powers of 110mW. The output of the Nd:YAG laser has been frequency doubled using MgO:LiNbO3 in an external resonant enhancement cavity. An overall energy conversion efficiency of 56% yielded 63mW of average power in bandwidth-limited 2.0ps pulses at 532nm.

© 1991 Optical Society of America

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