Spatial-energy characteristics of a focused laser beam with random phase distortions of the field inside an unstable resonator.

2018 ◽  
Author(s):  
V. I. Kislov ◽  
E. N. Ofitserov
Keyword(s):  
Laser Beam ◽  
Random Phase ◽  
Unstable Resonator ◽  
Energy Characteristics ◽  
Phase Distortions

Probing of a random phase object by a focused spatially modulated laser beam. Integral scanning method

1999 ◽  
Vol 25 (12) ◽  
pp. 971-973 ◽  
Author(s):  
V. P. Ryabukho ◽  
A. A. Chausskii ◽  
A. E. Grinevich
Keyword(s):  
Laser Beam ◽  
Random Phase ◽  
Phase Object ◽  
Scanning Method

Simple Modification of Positive-Branch Unstable Resonator for Diffraction-Limited XeCl Laser Beam

1995 ◽  
Vol 34 (Part 1, No. 9A) ◽  
pp. 4799-4802
Author(s):  
Hong Chu ◽  
Young Min Jhon ◽  
Sang Sam Choi ◽  
Dae Yoon Park
Keyword(s):  
Laser Beam ◽  
Unstable Resonator ◽  
Xecl Laser ◽  
Simple Modification

scholarly journals Reconstruction of wavefront distorted by atmospheric turbulence using a Shack-Hartman sensor

2019 ◽  
Vol 43 (4) ◽  
pp. 586-595 ◽  
Author(s):  
V.V. Lavrinov ◽  
L.N. Lavrinova
Keyword(s):  
Wave Function ◽  
Atmospheric Turbulence ◽  
Adaptive Optics ◽  
Numerical Experiments ◽  
Optical Radiation ◽  
Light Field ◽  
Random Phase ◽  
Zernike Polynomials ◽  
Turbulent Distortions ◽  
Phase Distortions

The reconstruction of a wave front containing random phase distortions of the light field is considered. The reconstruction is performed by a Hartmann method based on the approximation of the wave function by Zernike polynomials using estimates of local slopes. The slope values depend on the algorithms by which they are determined. The number of slopes is proportional to the number of focal spots recorded in the plane of the receiving device, which varies depending not only on the raster dimension, but also on the parameters of turbulence, design features of the receiving devices, as well as being restricted by the orthogonality of Zernike polynomials. Results of numerical experiments are given, which will be taken into account when creating adaptive optics systems for correcting strong turbulent distortions of the optical radiation.

Laser-beam apodization with a graded random phase window: erratum

1987 ◽  
Vol 12 (3) ◽  
pp. 223 ◽  
Author(s):  
Roger A. Haas ◽  
Mark A. Summers ◽  
Gary J. Linford
Keyword(s):  
Laser Beam ◽  
Random Phase
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