PARAMETERS OF GIANT LASER PULSES IN INSTANTANEOUS Q-SWITCHING,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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The paper derives approximate solutions of the differential equations for the giant laser pulses produced both by instantaneous and finite-time Q switching. Unlike earlier approximations, which apply only to certain particular conditions, the present solutions are more universal and can be used to calculate the energy and temporal parameters of the pulses. The results of the calculation are presented in the form of universal plots which make it possible to determine the giant-pulse parameters under arbitrary initial conditions, and also to determine the optimal conditions for the maximum output power, maximum energy, and minimum pulse duration. The obtained plots relate the reduced photon density in the cavity to the inversion density at different values of the frequency, the giant pulse parameters to the frequency, the pulse duration, pulse rise time, and peak power to the loss coefficient, and the maximum power to the mirror losses. It is only necessary to know the parameters of the cavity and of the laser active medium. The use of the curves is illustrated by a numerical example.
- Lasers and Masers