Laser beam focusing through the dense multiple scattering suspension using bimorph mirror

Galaktionov, Ilya; Kudryashov, Alexis; Sheldakova, Julia; Nikitin, Alexander

doi:10.1117/12.2509621

Cited by 9 publications

(5 citation statements)

References 33 publications

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“…As Figure 10 shows, the input power lost is practically negligible when separating it up to 4 mm from the optimal calculated distance. There is a slight reduction in that range because some light being lost by photon scattering through the particles or impurities, 33 as well as a change in the effective shadowing factor as it is considered constant but may depend on the arrangement of the light. For longer distances, input power is drastically lost (i.e., the I SC is much lower), but nonuniformity is reduced (V OC and FF increase).…”

Section: Resultsmentioning

confidence: 99%

Design and characterization of multijunction photovoltaic laser power converters for nonuniform irradiance light profiles

Delgado

García

Hinojosa

et al. 2023

Progress in Photovoltaics

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Nonuniform irradiance profiles of lasers used in power‐by‐light systems deteriorate the efficiency of photovoltaic laser power converters. We analyze three approaches to deal with this efficiency loss: (1) to design the power converter front grid for the nonuniform light received from the power‐by‐light system; (2) to strengthen the peak current and decrease the series resistance of tunnel junctions; and (3) to homogenize the light spot impinging the power converter by simply distancing it from the laser fiber. In the context of these approaches, this paper tackles the optimization of multijunction photovoltaic laser power converters to achieve their maximum efficiency under nonuniform irradiance profiles, without using any optical element to homogenize them and, this way, reproducing realistic operating conditions. As a direct application of the design shown in this paper, we have increased the experimental efficiency of our GaAs devices by up to 3% absolute for a nominal laser wavelength of 857 nm.

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Section: Resultsmentioning

confidence: 99%

Design and characterization of multijunction photovoltaic laser power converters for nonuniform irradiance light profiles

Delgado

García

Hinojosa

et al. 2023

Progress in Photovoltaics

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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 [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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“…A grid of control electrodes is applied to the external piezoceramic disk. The number of control electrodes depends on the type of aberrations to be compensated [51,52]. The scheme of the electrode dislocation and the principal scheme of the bimorph mirror are presented in Figure 3, while the main mirror parameters are given in Table 2.…”

Section: Bimorph Deformable Mirrormentioning

confidence: 99%

Atmospheric Turbulence with Kolmogorov Spectra: Software Simulation, Real-Time Reconstruction and Compensation by Means of Adaptive Optical System with Bimorph and Stacked-Actuator Deformable Mirrors

Galaktionov,

Sheldakova,

Samarkin

et al. 2023

Photonics

Self Cite

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Atmospheric turbulence causes refractive index fluctuations, which in turn introduce extra distortions to the wavefront of the propagated radiation. It ultimately degrades telescope resolution (in imaging applications) and reduces radiation power density (in focusing applications). One of the possible ways of researching the impact of 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, for example, a Shack–Hartmann sensor. In this paper, we developed turbulence simulator software that generates phase screens with Kolmogorov spectra. We reconstructed the generated set of phase screens using a stacked-actuator deformable mirror and then compensated for the introduced wavefront distortions using a bimorph deformable mirror. The residual amplitude of the wavefront reconstructed by the 19-channel stacked-actuator mirror was 0.26 λ, while the residual amplitude of the wavefront compensated for by the 32-channel bimorph mirror was 0.08 λ.

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Laser beam focusing through the dense multiple scattering suspension using bimorph mirror

Cited by 9 publications

References 33 publications

Design and characterization of multijunction photovoltaic laser power converters for nonuniform irradiance light profiles

Design and characterization of multijunction photovoltaic laser power converters for nonuniform irradiance light profiles

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

Atmospheric Turbulence with Kolmogorov Spectra: Software Simulation, Real-Time Reconstruction and Compensation by Means of Adaptive Optical System with Bimorph and Stacked-Actuator Deformable Mirrors

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