A5089131820- Orbital Angular Momentum in Optics
- Advanced Optical Imaging Technologies
- Laser Material Processing Techniques
- Semiconductor Lasers and Optical Devices
- Optical measurement and interference techniques
- Optical Systems and Laser Technology
- Photonic and Optical Devices
- Optical Wireless Communication Technologies
- Optical Coherence Tomography Applications
- Adaptive optics and wavefront sensing
- Infrared Target Detection Methodologies
- Radio Astronomy Observations and Technology
- Advanced Measurement and Detection Methods
- Photonic Crystals and Applications
- Advanced SAR Imaging Techniques
- Advanced Fiber Optic Sensors
- Advanced Surface Polishing Techniques
- Nonlinear Optical Materials Studies
- Solar-Powered Water Purification Methods
- Optical Coatings and Gratings
- Random lasers and scattering media
- Gas Sensing Nanomaterials and Sensors
- Welding Techniques and Residual Stresses
- Acoustic Wave Resonator Technologies
- Optical Polarization and Ellipsometry
Huazhong University of Science and Technology
2022-2024
Wuhan National Laboratory for Optoelectronics
2022-2024
Soochow University
2023
University of Shanghai for Science and Technology
2020
Laser stealth dicing can realize material separation with negligible surface damage, but severe aberrations in thick materials degrade processing quality. This Letter presents a nonlinear point-to-point transformation method combined spherical aberration compensation to achieve aberration-free axial multi-focus beams. The focus peak intensity increases 7 times at depth of 0.5 mm after compensation, and reaches 44 3.5 mm. Spherical experiments showed that the width heat-affected zone remains...
We report an efficient method to generate arbitrary three-dimensional (3D) parallel multifoci inside a material. Taking into account the numerical aperture of objective lens and refractive index material, Ewald cap was modified with longer radius, then whole 3D intensity distribution material could be calculated using only single Fourier transform (FT). By introducing adaptive weight coefficient, uniformity improves from 81.3% 98.9%. adjusting axial resolution cap, 85.9% 99.7%. In...
It is of great significance to control the energy, location, topological charge, and other parameters each beam in three-dimensional space. Thus, optical array proposed widely used processing, communication, microscopy, storage, fields. However, current methods generate are only effective specific scenarios. In this work, we present an efficient general method, which separates iterative calculation parameter selection by introducing a special mapping space, allowing generation arrays with...
Axial light distribution modulation is widely applied in optical tweezers, hard-brittle material cutting, multilayer laser direct writing, etc. To generate arbitrary axial distribution, the coordinate-transformation iteration (CTI) algorithm presented. The CTI unifies equations low and high numerical aperture (NA) scenarios, using same iterative to produce phase computer-generated holograms. In a NA scenario, twin-foci, flattop, sin2 distributions have been achieved. multirings, multifoci,...
Aperture, flexibly defined as common-seen periphery-blocked structures, or special-shaped patterns, even with artificial-designed complex amplitude modulating function, are inevitably a core limitation of optical system that deteriorates the beam modulation performance. To bridge gap between ideal simplified phase and real aperture-constrained system, we propose an inverse design algorithm (GOODBAP) which uses cascaded holograms to achieve arbitrary intensity distribution behind aperture....
The Airy$_\beta$ line ensemble is a random collection of continuous curves, which should serve as universal edge scaling limit in problems related to eigenvalues matrices and models 2d statistical mechanics. This unifies many existing objects including Tracy-Widom distributions, the Stochastic Airy Operator, Airy$_2$ process from KPZ theory. Here $\beta>0$ real parameter governing strength repulsion between curves. We introduce characterize terms Laplace transform, by producing integral...
Optical array is proposed and widely used in processing, communication, microscopy, storage other fields. However, the current methods to generate optical are only effective specific scenarios. In this work, we present an efficient general method, which separates iterative calculation parameter selection by introducing a special mapping space, allowing generation of arrays with arbitrary dimensions, optional parameters any energy ratios. This method compared traditional from both simulation...
We propose a redefinable neural network (RediNet), realizing general modulation on diverse structured light arrays through single approach. Exploiting the information sparsity of array distribution, dimension designation is used in RediNet, removing burden processing pixel-wise distributions. The prowess originally generating arbitraryresolution holographs with fixed firstly demonstrated. versatility showcased generation 2D/3D foci arrays, Bessel and Airy beams (perfect) vortex beam...
Holographic beam modulation is widely applied in optical tweezers, hard-brittle material marking, high-density storage, etc. To generate high-fidelity arbitrary 3-dimensional (3D) parallel multifoci inside the material, spherical aberration compensation automatic differentiation (SACAD) algorithm presented. All polarization components are included and embedded physical model. The technique of used error backpropagation procedure, ensuring efficient computing pixel-by-pixel gradients. In...
We research a system of compressed-sensing computational ghost imaging (CSCGI) based on the intensity fluctuation brought by turbulence. In this system, we used gamma-gamma intensity-fluctuation model, which is commonly in transmission systems, to simulate CSCGI system. By setting proper values parameters such as distance, refractive-index structure parameter, and sampling rates, peak signal-to-noise ratio (PSNR) performance bit-error rate (BER) are obtained evaluate quality, provides...
In the framework of laser precision machining, spherical aberrations beam increase gradually along machining depth, which is widely observed due to refractive index difference between material working pieces and surrounding medium. this paper, we report on a simple effective approach for spherical-aberration-free 3D forming inside materials. This new technique based modified Ewald cap related numerical aperture objective lens, material. method verified platform, where phase loaded spatial...