Abstract
Radiation emitted from a neodymium glass laser was modulated by exciting ultrasonic (20--200 kHz) longitudinal vibrations in the active element or in one of the resonator mirrors. The intensity modulation occurred at twice the ultrasonic vibration frequency, with a simultaneous increase by a factor of 2--3 in the average intensity of the spikes. The total energy emitted in a pulse remained constant. The laws governing the modulation were studied, especially its dependence on the ultrasonic amplitude and frequency, over a wide range of pump energies; these laws were independent of the type of active medium used. The mechanism of the ultrasonic modulation of solid-state laser radiation is considered.
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