Laser system components. Laser applications

Adaptive focusing of an optical beam by a system with delay in the control channel

V. A. Trofimov


Abstract: An aberration-free description of the propagation of a light beam is used to analyze and identify the characteristic features of continuous control of beam focusing by a system with a delay. It is shown that some control regimes may be oscillatory or diverging. The conditions for the appearance of these regimes are found. It is concluded that the conditions governing the operation of a system with a delay and a continuous control algorithm are equivalent to those for a system without a delay and with a discrete control algorithm.

UDC: 535.3:373.826

PACS: 42.68.Wt, 42.15.Fr, 07.05.Dz

Received: 15.12.1987
Revised: 24.02.1988

 English version: Soviet Journal of Quantum Electronics, 1988, 18:11, 1491–1493

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