This is an example of a Q-switched YAG laser. The configuration is indicated below.
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This YAG laser has two roof prisms as end mirrors, an electro-optic Q-switch, and outcoupling into converging lens and circular aperture where energy-in-the bucket will serve as a simple measure of beam quality. (expand)
Modeling of the transient response of the Q-switched laser is based on the four-level modeL; ground state, lower level N1, upper level N2, and pump level. (expand)
Output power as a function of the number of round-trips of the optical pulse. Views of the instantaneous output will be shown at 5 and 15 round trips.(expand)
Instantaneous output of the Q-switch pulse early in pulse (after 5 round-trips) showing the speckeled nature of the beam.