Phase correction of laser radiation with the use of adaptive optical systems at the Russian Federal Nuclear Center—Institute of Experimental Physics

Гаранин, С. Г.; Manachinsky, A. N.; Starikov, F. A.; Khokhlov, S. V.

doi:10.3103/s8756699012020045

Cited by 21 publications

(10 citation statements)

References 8 publications

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“…Its task is to compensate for the optical inhomogeneities that the laser beam acquires when the resonator is completely bypassed and to provide the quality of the output beam close to the diffraction quality. The adaptive mirror in the resonator can be controlled using the SPG algorithm [4]. As a criterion functional (metric) to be maximized, it is logical to use, for example, the axial radiant intensity of the output laser beam.…”

Section: Modeling Of Intra-cavity Correctionmentioning

confidence: 99%

Adaptive optics for Cr:CdSe laser with a moving active element

Volkov

Garutkin

Zakharov

et al. 2022

28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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The results of numerical studies of the possibility and efficiency of intra-cavity phase correction of Cr:CdSe laser radiation with the moving active elements using an adaptive optical system without a wavefront sensor are presented. The beam quality of the Cr:CdSe laser directly depends on the speed of movement of the active element due to the influence of thermal effects. The peak radiation power has determined by the efficiency of the resonator and the cooling system of the active element. It has been shown that the using of intra-cavity adaptive correction in the Cr:CdSe laser can significantly reduce the influence of thermal effects and expand the range of laser operation in single-mode regime.

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Section: Modeling Of Intra-cavity Correctionmentioning

confidence: 99%

Adaptive optics for Cr:CdSe laser with a moving active element

Volkov

Garutkin

Zakharov

et al. 2022

28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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“…The pointing of the maximum power of the speckled laser beam on the optical axis in the focal plane is carried out by means of stochastic parallel gradient (SPG) algorithm 8 . Updated SPG algorithm is constructed on a basis of threestep stochastic gradient descent method 9,10 .…”

Section: Problem Statementmentioning

confidence: 99%

Simulation of pointing the intensive speckle of a laser beam onto the target by means of SPG algorithm

Shnyagin

Starikov

2022

28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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The numerical simulations of possibility of effective delivery of the speckled laser beam energy through the optical heterogeneous medium onto a target have been carried out. The calculations of speckled beam have been carried out within the framework of a numerical model of integration of the parabolic equation for the laser field amplitude taking into account the turbulence according to the phase screens model. Two approaches for pointing the speckled laser radiation onto the target in far field have been considered: the first approach is concerned with the preliminary scanning of the focal plane by the beam with the subsequent SPG correction of the beam position, and the second approach is the direct tip-tilts SPG correction without scanning. The probability estimation of the performance efficiency of the pointing system has been performed. It is shown that in both cases it is possible to direct the most intensive speckle of the laser beam onto the target with high probability.

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“…Next we consider the possibility to transform the wavefronts of the vortex beam by means of the closed-loop adaptive optical system with a wavefront sensor and a flexible deformable wavefront corrector. We can use the bimorph [166] as well as pusher-type [167,168] piezoceramic-based adaptive mirrors as a wavefront corrector. In the experiments a flexible bimorph mirror [166] and the Hartmann-Shack wavefront sensor with a new reconstruction algorithm [157][158][159] are employed.…”

Section: Phase Correction Of Optical Vortexmentioning

confidence: 99%