Adaptive correction of the focused beam in conditions with strong fluctuations of intensity

Vladimir P. Lukin; Boris V. Fortes

doi:10.1117/12.391868

21 July 2000 Adaptive correction of the focused beam in conditions with strong fluctuations of intensity

Vladimir P. Lukin, Boris V. Fortes

Proceedings Volume 4034, Laser Weapons Technology; (2000) https://doi.org/10.1117/12.391868
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

The adaptive correction was frequently treated as straightening of wavefront, if deal with receiving of the deformed wave. For adaptive focusing of beams the correction was considered as predistortion of wavefront. However with infringement of a condition smoothness of wavefront, the situation varies. It is known, that dislocations of wavefront conterminous to points where instant meaning of intensity equal to zero, arise with distances approximately equal diffraction length. With presence of such points the wavefront of a reference wave cannot be determined as a smooth one-coherent surface, therefore efficiency of adaptive systems with flexible mirrors begins to be reduced. At the same time, the numerical experiment with model of a compound phase corrector has shown, that its efficiency practically does not change with transition in area of strong fluctuations of intensity. We have found out, that the efficiency of adaptive system with a compound corrector does not vary with transition from area weak fluctuations of intensity in area strong fluctuations.

Citation Download Citation

Vladimir P. Lukin and Boris V. Fortes "Adaptive correction of the focused beam in conditions with strong fluctuations of intensity", Proc. SPIE 4034, Laser Weapons Technology, (21 July 2000); https://doi.org/10.1117/12.391868

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