Abstract
Methods for synchronization of nitrogen lasers and techniques for expanding laser beams were developed. An angular divergence of 0.1 mrad, a peak power of 1.5 MW, and a pulse duration of 1.2 nsec were achieved. An atmospheric nitrogen laser was used as a master oscillator and a low-pressure nitrogen laser was employed as an amplifier. They were synchronized to within 1 nsec. Several variants of synchronization by delay lines and methods for expanding a laser beam were investigated.
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