A study of passively Q-switched microchip laser pulse trains yields approximate,
yet reliable, formulae for the peak power, pulse energy, half-width, period, and
the pulse shape in time. The pulse gain differential equation is made integrable
by assuming that the laser absorption cross sections for the gain and saturable
absorber are equal. We compare our predictions with an experiment which uses
Nd:YAG as a gain medium and Cr:YAG as a saturable absorber. The agreement
between theory and experiment for the period, pulse width, and the pulse energy
is within 10%.
© Optical Society of America
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