Giant Pulses from a Laser: Optimum Conditions

Abstract

The conditions for maximized peak power extraction from a giant pulse laser are examined. In order to formulate an appropriate mathematical framework relating the various significant magnitudes, some simplifying assumptions and approximations have been used. The critical coupling conditions and the value of the resulting optimum peak power as a function of a characteristic loss factor have been determined. A distinction is made between maximum peak power and maximum energetic yield since the conditions for the achievement of both are slightly different.

Pulse shaping effects in Q-switched laser oscillators

“…Menat [3] making use of balance equations. The pulses show rather an increasing modulation with increasing gain factors of the active medium, thus being cut into pieces at time intervals equal to the cavity round trip time.…”

“…2 may be compared with earlier calculations by Menat [3]. In his table II the reduced maximum photon density and the half-width time of the giant pulse are given as a function of the reduced threshold population, a single parameter which takes account of the gain factor, the losses in the active medium and the mirror transmission as well.…”

“…It is clearly demonstrated that simple balance equations that give an adequate description of long pulses are not sufficient any more to describe pulses of the order of the cavity flight time, and their solutions may therefore not be extrapolated for high gains as was done e.g. by Menat [3].…”

Solid state lasers

“…Режим стационарного усиления при неоднородно уширенной линии рассмотрен в работе 27(i 15 . Сохраняется также выражение (38) для мощности генерации, при этом усреднение о д проводится по всем возбуждаемым ТК. Можно полагать, что полученные соотношения действительны также и для резонатора с круглыми зеркалами диаметром D. В рамках данной модели может быть учтено также влияние неравномерности накачки на угловое расхождение 15 .…”

Output Properties of Short-Pulse Gain-Switched Lasers

“…aI(y, t)]/(at),= k homogeneous 1. ",2 Data for the xenon laser show an exponential gain constant of about g(0)hom 4 X 108 sec-' and a pulse delay of about t -5 X 10-8 sec.…”