Effects of mitigation of pixel cross-talk in the encoding of complex fields using the double-phase method

Carbonell-Leal, Miguel; Mendoza-Yero, Omel

doi:10.1117/1.oe.59.4.041203

Cited by 10 publications

(7 citation statements)

References 34 publications

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“…Table 1 shows the values of the correlation function peaks for the case of detecting two wavefront aberrations. As can be seen from Table 1, the difference between the measured values { } for two Firstly, correlation functions of a single aberration (vertical astigmatism Z 2 2 ) were obtained using classical Fourier transform lenses with a focal length of 250, 500, and 1000 mm. Further, using the same scheme, correlation functions for two aberrations (vertical astigmatism Z 2 2 and vertical coma Z −1 3 ) were recorded.…”

Section: Resultsmentioning

confidence: 99%

“…New methods and devices with a wide variety of properties and parameters [1][2][3] are being developed based on controllable optical components due to the variety and flexibility of such devices. Microdisplays are used more and more often as metrological tools for monitoring parameters of laser beams, in adaptive atmospheric sounding systems, imaging optical holography systems, etc.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lensless Scheme for Measuring Laser Aberrations Based on Computer-Generated Holograms

Krasin

Kovalev

Stsepuro

et al. 2020

Sensors

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All of the existing holographic wavefront sensors are either bulky or have low accuracy of measuring wavefront aberrations. In this paper, we present an improvement of the holographic method of measuring wavefront aberrations using computer-generated Fourier holograms. The novelty of this work lies in the proposed approach to the synthesis of Fourier holograms, which are implemented using phase-only SLM. The main advantages of this method are the increased diffraction efficiency compared to the previously known methods, and the more compact implementation scheme due to the elimination of the conventional Fourier-lens. The efficiency of the proposed method was confirmed by numerical simulation and optical experiments.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lensless Scheme for Measuring Laser Aberrations Based on Computer-Generated Holograms

Krasin

Kovalev

Stsepuro

et al. 2020

Sensors

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show abstract

“…For the first experiment, alltested FFDLs have focal lengths and axial focal depths fixed to 𝑓 = 200 𝑚𝑚 and ∆𝑧 = were attenuated by using binary gratings 𝑀 1 (𝑥, 𝑦) and 𝑀 2 (𝑥, 𝑦) with more than 2×2 pixels per cell. The optimization process was carried out by progressively increasing the pixels per cell until the best approximation to the expected results was achieved [43,45]. For the used pho-SLM, acceptable results appeared when binary gratings had 3×3 pixels per cell, up to a maximum of 5×5 pixels per cell.…”

Section: Methodsmentioning

confidence: 99%

“…So, the successful realization of FFDLs with commercial pho-SLMs may be conditioned by unwanted pixel crosstalk effects. That is why, a correct mitigation of these effects [43,45] could be essential to bring the phase modulation in the pho-SLM closer to that expected from the theory. In the next section, crosstalk phenomenon is properly reduced while carrying out the practical demonstration of FFDLs.…”

Section: Mathematical Modelmentioning

confidence: 98%

Dynamic freeform diffractive lens

Mendoza-Yero¹

2023

Preprint

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In the framework of the scalar theory of diffraction a surface-pixeled convergent lens for arbitrary amplitude and phase modulation along the depth of focus is introduced. This complex diffractive lens is computer-generated from an exact solution of the inverse focal shaping problem obtained by using the Fresnel diffraction integral. The spatial multiplexing technique of double-phase method is employed to encode the complex diffractive lens into a phase optical element that can be dynamically implemented with a commercial liquid-crystal spatial light modulator. The optical surface of this lens, capable of generating not only a single axial focus but also multiple parallel foci, has neither linear nor rotational symmetry but phase jumps from one pixel to another. In addition to intensity shaping, the introduced lens provides simultaneous control over the phase of light along the depth of focus, which can be very attractive for improving and/or developing photonic applications related to the interaction of coherent laser beams with matter.

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“…We have studied this problem and proposed an alternative strategy to mitigate its effects. Further details about this work can be found in [51].…”

Section: Pixel Cross-talkmentioning

confidence: 99%

Complex spatial shaping of femtosecond pulses with phase-only spatial light modulators

Leal¹

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Among the most notable results obtained during this thesis, it is worth highlighting: 1. The experimental development and improvement of a double-phase method. 2. The introduction of a novel spatial phase multiplexed technique able to generate arrays of foci with extremely high precision in the position and peak energy of foci. 3. The development of a new calibration technique for phase-only SLMs to increase the accuracy and control capabilities of these devices. 4. The application of the optimized double-phase method to enhance both non-linear microscopic through the introduction of a complex lighting scheme and non-linear optical processes (e.g., secondharmonic generation or filamentation) by means of an accurate control of light parameters.

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Effects of mitigation of pixel cross-talk in the encoding of complex fields using the double-phase method

Cited by 10 publications

References 34 publications

Lensless Scheme for Measuring Laser Aberrations Based on Computer-Generated Holograms

Lensless Scheme for Measuring Laser Aberrations Based on Computer-Generated Holograms

Dynamic freeform diffractive lens

Complex spatial shaping of femtosecond pulses with phase-only spatial light modulators

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