Anna Lylova

New approach for laser beam formation by means of deformable mirrors

Sometimes to improve the performance of industrial or scientific laser technology it is desired to transform an intensity distribution from Gaussian to the flattop. The adjusting of the intensity profile can be implemented by means of adaptive optics. In this paper we present laser beam control with bimorph deformable mirrors. Shack-Hartmann wavefront sensor is used to determine the control signal for the bimorph deformable mirror while focal spot is observed with CCD camera to check the result of beam shaping.

The real-time atmospheric turbulence modeling and compensation with the use of adaptive optics

It is suggested to reconstruct the phase screens with the use of different deformable mirror types. In this work we present the results of the phase screen reproducing with the use of stacked-actuator deformable mirror and bimorph one. The reconstruction results were compared. The problems of the reconstruction were discussed.

Beam shaping by means of different wavefront correctors

For some applications it is necessary to transform an intensity distribution from Gaussian to a flattop, doughnut, etc. It could be performed with the use of adaptive optics that distorts the phase of the beam and changes the shape of the focal spot in the far-field. In this paper, we present the flattop and doughnut beam formation result with the use of a bimorph and stacked-actuator deformable mirrors. The experimental results are also given.

Atmopheric turbulence modeling by means of deformable mirrors with the use of phase interpolation

The efficiency of the reconstruction and correction of the real-time atmospheric turbulence by means of the stacked-actuator deformable mirror and the bimorph deformable mirror was shown. The characteristics of the spatial reconstruction are discussed. The phase screens interpolation methods are presented. The problems of the phase reconstruction are discussed.

Hartmannometer — device to measure optical elements

In this paper we consider two approaches widely used in optical testing: Shack-Hartmann wavefront sensor and Fizeau interferometer technique. Fizeau interferometer that is widely used in optical testing can be easily transformed to a device using Shack-Hartmann wavefront sensor, the alternative technique to check optical components. We call this device Hartmannometer, and compare its features to those of Fizeau interferometer.

New approaches of uniform focal spot formation by means of deformable mirror

In this paper the results of the flat-top beam formation by means of bimorph deformable mirror are presented. The problems of simulation are discussed. A new method for beam structure modification is suggested.

Uniform focal spot formation in adaptive system with Shack-Hartmann sensor and M2 sensor

Recent results of formation of uniform beam intensity distribution at the focal plane of a lens by means of bimorph deformable mirrors are presented. An approach based on the use of Shack-Hartmann wavefront sensor together with focal spot sensor (M2 meter) is suggested. Advantages and disadvantages are discussed.

A new method of the real-time atmospheric turbulence modeling

It is suggested to reconstruct the real-time atmospheric turbulence in the lab by means of the stacked-actuator deformable mirror and the bimorph deformable mirror. The characteristics of the spatial reconstruction are discussed. The phase screens interpolation methods are presented. The problems of the reconstruction are shown.

Problems of uniform focal spot formation by means of deformable mirror

In this paper we present recent results of formation of different beam intensity distribution by means of bimorph deformable mirrors. We discuss the results of such formation as well as the problems that one faces on this way. A new method for beam structure modification is suggested based on the use of Shack-Hartmann wavefront sensor with the combination of standard M2 meter.

The real-time atmospheric turbulence modeling and compensation with use of adaptive optics

It is suggested to reconstruct the phase screens with the use of stacked-actuator deformable mirror and to compensate for the introduced distortions by the bimorph mirror. The reproducing and correction results are presented in the paper. The problems of the reconstruction and compensation are discussed.