Flat-top beam formation with miniature bimorph deformable mirror

Sheldakova, Julia; Toporovsky, Vladimir; Galaktionov, Ilya; Nikitin, Alexander; Rukosuev, Alexey; Samarkin, Vadim; Kudryashov, Alexis

doi:10.1117/12.2569387

Cited by 9 publications

(9 citation statements)

References 4 publications

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“…A bimorph mirror consists of a passive glass substrate with a reflective coating and two piezoceramic disks glued to it [49,50]. A common electrode is applied to the internal piezoceramic disk, which is designed to change the curvature of the reflecting surface of the mirror.…”

Section: Maximum Input Voltage −30…+130 V −200…+300 Vmentioning

confidence: 99%

Atmospheric turbulence generator: software and hardware implementation of Kolmogorov phase screen simulation system

Galaktionov,

Sheldakova,

Toporovsky

et al. 2024

Laser Resonators, Microresonators, and Beam Control XXVI

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Atmospheric turbulence causes refractive index fluctuations that introduce extra distortions to the wavefront of the propagated radiation. It degrades the resolution of the telescope for imaging applications and reduces the radiation power density in focusing applications. One of the possible ways of research the impact of the turbulence is to numerically simulate the spectrum of refractive index fluctuations, to reproduce it using a wavefront corrector and to measure the resultant wavefront using a Shack-Hartmann sensor. In this paper, we developed turbulence simulator software that generates the sequence of phase screens with Kolmogorov spectra. We reconstructed the generated set of phase screens using a stacked-actuator deformable mirror.

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Section: Maximum Input Voltage −30…+130 V −200…+300 Vmentioning

confidence: 99%

Atmospheric turbulence generator: software and hardware implementation of Kolmogorov phase screen simulation system

Galaktionov,

Sheldakova,

Toporovsky

et al. 2024

Laser Resonators, Microresonators, and Beam Control XXVI

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show abstract

“…A bimorph mirror consists of a passive glass substrate with a reflective coating and two piezoceramic disks glued to it [51]. A common electrode is applied to the internal piezodisk, designed to change the curvature of the reflecting surface of the mirror.…”

Section: Bimorph Deformable Mirrormentioning

confidence: 99%

Overcoming challenges in laser beam focusing through a moderately scattering medium: stacked-actuator vs. bimorph deformable mirror

Galaktionov,

Sheldakova,

Toporovsky

et al. 2023

29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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The paper presents an analysis of the efficiency of using bimorph deformable mirrors and mirrors on piezoactuators for the problem of focusing scattered laser radiation. In this paper, we study the efficiency of a piezoactuator deformable mirror with 61 piezopackets and an aperture of 60 mm, as well as a bimorph mirror with 48 electrodes and an aperture of 50 mm. It is shown that such mirrors can be used to optimize the focal spot formed by scattered radiation in the far-field.

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“…In [49], the authors describe an adaptive system with a deformable mirror and tip-tilt corrector for a 0.12 m telescope on the 3 km horizontal atmospheric path. Most of the papers described above are devoted to the compensation of turbulence phase fluctuations [50][51][52][53]. In this paper, we will first numerically simulate the effect of the specific turbulent atmosphere conditions on the wavefront of laser radiation.…”

Section: Introductionmentioning

confidence: 99%

Wide-aperture multichannel Shack-Hartmann sensor for multispectral wavefront measurements

Galaktionov,

Nikitin,

Sheldakova

et al. 2024

Laser Resonators, Microresonators, and Beam Control XXVI

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A multispectral wavefront sensor can be used to perform a single-shot spatio-temporal characterization of a laser pulse. In order to measure the spatio-spectral electric field, a laser pulse can be spectrally modulated, separated and measured by a wavefront sensor. In order to simplify the experimental setup and hardware control, the single wavefront sensor can be used. In this research we discuss the development of the multi-channel wide-aperture high-resolution Shack-Hartmann sensor for multispectral wavefront sensing. The whole sensor area of 15×15 mm was divided into 4 logical apertures, each for separate laser beam. The development and calibration procedure are described. The wavefront sensor control software is developed and tested.

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Flat-top beam formation with miniature bimorph deformable mirror

Cited by 9 publications

References 4 publications

Atmospheric turbulence generator: software and hardware implementation of Kolmogorov phase screen simulation system

Atmospheric turbulence generator: software and hardware implementation of Kolmogorov phase screen simulation system

Overcoming challenges in laser beam focusing through a moderately scattering medium: stacked-actuator vs. bimorph deformable mirror

Wide-aperture multichannel Shack-Hartmann sensor for multispectral wavefront measurements

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