Angular multiplexing as a technique for short-pulse amplification in a high-gain xenon amplifier

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Abstract
It has been proposed that the technique of angular multiplexing could provide an efficient scheme for extracting short pulses from a high‐gain laser with a high degree of spatial and temporal control of the extracted laser beam. The scheme of angular multiplexing proposes to amplify short laser pulses (∼1 nsec) by sequentially passing these pulses through the amplifier at slightly different angles. The intensity of each pulse must be sufficient to control amplified spontaneous emission and to extract a significant fraction of the available energy. The experimental demonstration of this technique on the high‐gain xenon laser is described here. The measurements were made for a two‐pulse train with each pulse width shorter than the amplifier gain period. The results of this experiment indicate that for an optimum pulse separation and input pulse intensity, a major fraction of the available laser energy could be extracted efficiently by the pulse train without significant pulse distortion.