Bimorph deformable mirror with a high density of electrodes to correct for atmospheric distortions

Toporovskiy, Vladimir; Kudryashov, Alexis; Samarkin, Vadim; Sheldakova, Julia; Rukosuev, Alexey; Скворцов, А. А.; Pshonkin, Danila E.

doi:10.1364/ao.58.006019

Cited by 32 publications

(6 citation statements)

References 35 publications

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“…For example, if the system can correct for the aberrations of the first 15 Zernike polynomials, then up to 90% of the WF distortions introduced by turbulence will be compensated. In that case, probably, it would be useful to apply the low-cost bimorph deformable mirror that can successfully reproduce the first 25 Zernike modes [23,24]. It can also be noted that the created mathematical apparatus will make it possible to analyze the parameters of real atmospheric turbulence.…”

Section: Discussionmentioning

confidence: 99%

Expansion of the Laser Beam Wavefront in Terms of Zernike Polynomials in the Problem of Turbulence Testing

et al. 2021

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The results of a study of the wavefront distortions of laser radiation caused by artificial turbulence obtained in laboratory conditions using a fan heater are presented. Decomposition of the wavefront in terms of Zernike polynomials is a standard procedure that traditionally is used to investigate the set of existing aberrations. In addition, the spectral analysis of the wavefront dynamics makes it possible to estimate the fraction of the energy distributed between different Zernike modes. It is shown that the fraction of energy related to the low-order polynomials is higher compared to the high-order polynomials. Also, one of the consequences of Taylor’s hypothesis is confirmed—low-order aberrations are slower compared to the higher-order ones.

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Section: Discussionmentioning

confidence: 99%

Expansion of the Laser Beam Wavefront in Terms of Zernike Polynomials in the Problem of Turbulence Testing

et al. 2021

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“…Bimorph deformable mirrors differ from the other types of mirrors due to their possibility of precise correction for the large-scale aberrations using the rather small number of control electrodes [16]. Bimorph DMs of medium size (100-170 mm in diameter) installed in titanium-sapphire lasers with a peak power of 100-200 TW have already made it possible to achieve the intensities of 10 19 -10 20 W/cm 2 [17][18][19], which confirms the efficiency of this type of mirrors.…”

Section: Materials and Methods (Design Of A 320 MM Bimorph Deformable...mentioning

confidence: 99%

Wide-Aperture Bimorph Deformable Mirror for Beam Focusing in 4.2 PW Ti:Sa Laser

et al. 2022

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The bimorph deformable mirror with a diameter of 320 mm, including 127 control electrodes, has been developed and tested. The flatness of the initial mirror surface of about 1 μm (P-V) was achieved by mechanically adjusting the mirror substrate fixed in the metal mount. To correct for the aberrations and improve the beam focusing in the petawatt Ti:Sa laser, the wide-aperture adaptive optical system with the deformable mirror and Shack–Hartmann wavefront sensor was developed. Correction of the wavefront aberrations in the 4.2 PW Ti:Sa laser using the adaptive system provided increases the intensity in the focusing plane to a value of 1.1 × 1023 W/cm2

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“…The methods used to describe the deformed surface vary depending on the optical requirements. There are two commonly used methods, one is to calculate the peak-tovalley value or the root-mean-square value of the deformation to describe the degree of deformation [10][11][12][13][14][15][16][17], and the other is to use the Zernike polynomial to describe the shape of the deformed optical surface [18][19][20][21][22][23][24][25][26][27]. In some cases, special characteristics can be used to represent the deformation, such as the using of the deformation at a particular location [28] or the spherical aberration of the surface deformation [29] to represent the deformation of the entire surface.…”

Section: Introductionmentioning

confidence: 99%

Calculating the area of a particular deformation region of an optical surface based on the finite element method

2023

J. Opt.

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To study the deformation of an optical surface and its effect on optical performance, a method based on the finite element method for calculating the area of a particular deformation region of an optical surface is proposed, and a concept of effective area ratio is further introduced to describe the effect of deformation on optical performance. The principle of the method is presented, and the deformation of a potassium dihydrogen phosphate (KH2PO4, KDP) crystal is studied using this method, while the calculation accuracy is discussed. The results demonstrate that the method and the concept of effective area ratio are available for studying the deformation of an optical surface and its effect on optical performance.

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Bimorph deformable mirror with a high density of electrodes to correct for atmospheric distortions

Cited by 32 publications

References 35 publications

Expansion of the Laser Beam Wavefront in Terms of Zernike Polynomials in the Problem of Turbulence Testing

Expansion of the Laser Beam Wavefront in Terms of Zernike Polynomials in the Problem of Turbulence Testing

Wide-Aperture Bimorph Deformable Mirror for Beam Focusing in 4.2 PW Ti:Sa Laser

Calculating the area of a particular deformation region of an optical surface based on the finite element method

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