Caustic of Gaussian laser beam with field phase random distortions

V. I. Kislov; E. N. Ofitserov

doi:10.1117/12.2548966

11 December 2019 Caustic of Gaussian laser beam with field phase random distortions

V. I. Kislov, E. N. Ofitserov

Proceedings Volume 11322, XIV International Conference on Pulsed Lasers and Laser Applications; 1132211 (2019) https://doi.org/10.1117/12.2548966
Event: XIV International Conference on Pulsed Lasers and Laser Applications (AMPL-2019), 2019, Tomsk, Russian Federation

Abstract

In the Fresnel approximation, a laser beam with field phase random distortions is represented by the sum of diffraction-limited and scattered component. Analytical and semi-analytical relationships are obtained that approximate the flux radiation distribution function with a relative error of a few percent depending on the size of the receiver and its distance without limiting the amplitude and scale of field phase random distortions. It is accepted in the work that phase random distortions are distributed according to the normal law, are statistically homogeneous, and have a Gaussian correlation function. The axial intensity, radius of the beam and its caustic is studied depending on the phase distortions parameters. It is established that the phase distortions presence can lead to the appearance of a second maximum in the intensity distribution along the optical axis and a shift of the global maximum closer to the optical system output aperture. The research results can be used in the development of optical transmitters and adaptive optical systems, in tomographic studies of laser radiation, in the development of methods for measuring parameters and determining the optical quality of laser beams and optical systems.

Citation Download Citation

V. I. Kislov and E. N. Ofitserov "Caustic of Gaussian laser beam with field phase random distortions", Proc. SPIE 11322, XIV International Conference on Pulsed Lasers and Laser Applications, 1132211 (11 December 2019); https://doi.org/10.1117/12.2548966

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