Abstract
A flash-pumped Nd:YAG laser has been effectively Q switched with an acousto-optic beam deflector in a resonator arranged such that the deflected laser beam goes into feedback while the undeflected beam is the output. This allows the laser threshold, and consequently the output pulse energy, to be electronically controlled via the rf power applied to the deflector permitting the extraction within a single pump flash of a sequence of Q-switched pulses with individually predetermined energies and spacings. Further, because the low Q state of the resonator involves almost 100% round-trip loss and no power to the deflector, high standoff capability and low-rf-power requirements are realized.
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