2022
DOI: 10.3390/photonics9050351
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Real-Time Correction of a Laser Beam Wavefront Distorted by an Artificial Turbulent Heated Airflow

Abstract: This paper presents a FPGA-based closed-loop adaptive optical system with a bimorph deformable mirror for correction of the phase perturbation caused by artificial turbulence. The system’s operating frequency of about 2000 Hz is, in many cases, sufficient to provide the real-time mode. The results of the correction of the wavefront of laser radiation distorted by the airflow formed in the laboratory conditions with the help of a fan heater are presented. For detailed consideration, the expansion of the wavefro… Show more

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Cited by 12 publications
(9 citation statements)
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“…Prepared base elements sized 26 x 26 x 5.5 mm were assembled into a package with active layers (26 x 26 x 0.5 mm), after which the compression welding of the piezoceramic block (6) took place. The assembled and welded block was again subjected to mechanical processing (grinding of the end surfaces) (7), after which it was sawn into separate modules (8).…”
Section: Cartridge-type Piezostack Deformable Mirrormentioning
confidence: 99%
See 1 more Smart Citation
“…Prepared base elements sized 26 x 26 x 5.5 mm were assembled into a package with active layers (26 x 26 x 0.5 mm), after which the compression welding of the piezoceramic block (6) took place. The assembled and welded block was again subjected to mechanical processing (grinding of the end surfaces) (7), after which it was sawn into separate modules (8).…”
Section: Cartridge-type Piezostack Deformable Mirrormentioning
confidence: 99%
“…Various methods could be used to mitigate influence of the atmospheric turbulence on the wavefront of the laser beam propagated over the distance. The most popular of them are spatial or time diversity [2,3] , coherent combining [4] , coding [5] or adaptive optics techniques [6,7] . Among all of these approaches latter proved its efficiency for a lot of applications: free-space communications systems [8], space debris removal [9] , material processing [10] , UAV laser destruction [11] and so on [12][13][14] .…”
Section: Introductionmentioning
confidence: 99%
“…To manipulate the properties of the laser beam (intensity distribution, focusability, phase distortions compensation) a lot of techniques could be used: hardware (like focusators [1] , shapers [2,3] , adaptive optics methods [4][5][6][7][8] ), software (luckyimaging [9][10][11] , global processing [12] ) or using both techniques (for example, phase diversity [13,14] ). Main goal of using such devices or methods is mitigate undesirable effects on the laser beam propagated over distance.…”
Section: Introductionmentioning
confidence: 99%
“…Former (absorption, scattering) phenomena could be overcome by optimization of the optical wavelength [1] . To improve the quality of optical beam impaired due to the turbulence a lot of various techniques could be used such as: aperture averaging [2] , diversity [3] , adaptive optics [4,5] , modulation and coding [6] .…”
Section: Introductionmentioning
confidence: 99%