Control of laser radiation parameters

Properties of self-compensation for three-dimensional periodic phase distortions in active media of gas-flow lasers

V. V. Lobachev

Baltic State Technical University, St. Petersburg

Abstract: A mathematical model for optimising the beam formation direction in an active medium with three-dimensional periodic perturbations is developed. This model is applicable to the refractive-index distributions that can be represented in a multiplicative form with separated variables. The analysis of the actual structure of perturbations that appear behind the original nozzle assembly of a cw chemical laser has shown that the optimal direction of the beam formation lies in the region of partial self-compensation for distortions, which ensures an acceptable wave-front quality of the formed radiation.

PACS: 42.55.Lt, 42.55.Ks, 42.60.Jf

Received: 03.10.2002

 English version: Quantum Electronics, 2003, 33:10, 889–893

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