Abstract
A pulsed Ho:YAG system has been investigated both as an oscillator and an amplifier. The oscillator was operated normal mode in the TEM <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">00</inf> mode with a slope efficiency of 0.012. When <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</tex> -switched, the laser produced in excess of 80 mJ per pulse with a pulse length of about 30 ns. The predictions of pulse length and energy are in fair agreement with a simple theory presented within. The Ho:YAG was also operated as an amplifier. Large signal gains in excess of 2.0 were observed, which is closely comparable with theoretical predictions. Mode-locked pulses, with a pulse length of about 0.57 ns, were produced by using an acoustooptic mode locker.
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