Speckle-reduced holographic beam shaping with modified Gerchberg–Saxton algorithm
Sign Up to like & getrecommendations! Published in 2019 at "Optics Communications"
DOI: 10.1016/j.optcom.2018.09.076
Abstract: Abstract Holographic laser beam shaping using a spatial light modulator can provide flexible adaptation of the intensity profile. However, speckle noise exists in the shaped beams, which reduces the beam quality seriously. In this paper,… read more here.
Keywords: saxton algorithm; gerchberg saxton; beam; phase ... See more keywords
Dynamic laser beam shaping for material processing using hybrid holograms
Sign Up to like & getrecommendations! Published in 2018 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2017.12.022
Abstract: Abstract A high quality, dynamic laser beam shaping method is demonstrated by displaying a series of hybrid holograms onto a spatial light modulator (SLM), while each one of the holograms consists of a binary grating… read more here.
Keywords: processing using; hybrid holograms; dynamic laser; laser beam ... See more keywords
Alignment of electron optical beam shaping elements using a convolutional neural network.
Sign Up to like & getrecommendations! Published in 2021 at "Ultramicroscopy"
DOI: 10.1016/j.ultramic.2021.113338
Abstract: A convolutional neural network is used to align an orbital angular momentum sorter in a transmission electron microscope. The method is demonstrated using simulations and experiments. As a result of its accuracy and speed, it… read more here.
Keywords: electron optical; neural network; beam shaping; convolutional neural ... See more keywords
Controllable beam shaping of coherent and incoherent beams by a laser amplifier
Sign Up to like & getrecommendations! Published in 2018 at "Laser Physics Letters"
DOI: 10.1088/1612-202x/aad943
Abstract: We propose the technique for a controllable manipulation of the transverse intensity distribution of an output beam by the temporal adjustment of a transverse gain profile in a laser amplifier. It was created by an… read more here.
Keywords: shaping coherent; output; controllable beam; laser amplifier ... See more keywords
Electron beam shaping via laser heater temporal shaping
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review Accelerators and Beams"
DOI: 10.1103/physrevaccelbeams.24.110703
Abstract: Active longitudinal beam optics can help FEL facilities achieve cutting edge performance by optimizing the beam to: produce multi-color pulses, suppress caustics, or support attosecond lasing. As the next generation of superconducting accelerators comes online,… read more here.
Keywords: beam shaping; electron beam; laser heater; beam ... See more keywords
Code-Dependent Beam Shaping and Polarization Control by Binary Transmitarray
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Transactions on Antennas and Propagation"
DOI: 10.1109/tap.2023.3265460
Abstract: A code-dependent methodology is proposed to realize beam shaping and polarization control simultaneously by using binary transmitarray (BTA). The BTA unit elements are divided into two types, which are linearly polarized in orthogonal directions. By… read more here.
Keywords: code dependent; beam shaping; shaping polarization; methodology ... See more keywords
Deep Learning-Based Ultrasound Beam Shaping for Spatiotemporal Acoustic Holograms Generation
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"
DOI: 10.1109/tuffc.2023.3264580
Abstract: Acoustical hologram generation can be achieved via controlled beam shaping by engineering the transmitted phases to create a desired pattern. Optically inspired phase retrieval algorithms and standard beam shaping methods assume continuous wave (CW) insonation,… read more here.
Keywords: beam; generation; beam shaping; deep learning ... See more keywords
Beam Shaping for Massive MIMO Systems With One-Bit Spatial $\Sigma -\Delta$ ADCs
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Transactions on Vehicular Technology"
DOI: 10.1109/tvt.2022.3208064
Abstract: One-bit quantization opens up opportunities for massive MIMO implementation using cheap and power-efficient radio-frequency front-ends, but unfortunately brings severe amplitude distortion. The spatial $\Sigma -\Delta$ structure is one important manner that can recover the amplitude… read more here.
Keywords: spatial sigma; beam; one bit; beam shaping ... See more keywords
Optimization of beam shaping for ultrasensitive inertial measurement using a phase-only spatial light modulator.
Sign Up to like & getrecommendations! Published in 2022 at "Applied optics"
DOI: 10.1364/ao.441418
Abstract: This study proposes an approach to generate a uniform flat-top beam with a liquid crystal spatial light modulator (LC-SLM) to optimize ultrasensitive inertial measurement. The random incomplete Gaussian beam is modulated into a flat-top beam… read more here.
Keywords: beam; inertial measurement; optimization; ultrasensitive inertial ... See more keywords
Laser beam shaping with circular serrated apertures. II. Theory of the beam profile formation.
Sign Up to like & getrecommendations! Published in 2019 at "Applied optics"
DOI: 10.1364/ao.58.004910
Abstract: Propagation of an axially symmetrical beam through an apodizer comprising a circular serrated aperture and a spatial filter is considered on the basis of the parabolic equation solution. In Part II, the equation is solved… read more here.
Keywords: serrated apertures; laser beam; shaping circular; beam ... See more keywords
Designing double freeform surfaces for collimated beam shaping with optimal mass transportation and linear assignment problems.
Sign Up to like & getrecommendations! Published in 2018 at "Optics express"
DOI: 10.1364/oe.26.024602
Abstract: We propose a method for designing refractive optical elements for collimated beam shaping in the geometrical optics approximation. In this method, the problem of finding a ray mapping is formulated as a linear assignment problem,… read more here.
Keywords: collimated beam; method; linear assignment; mass transportation ... See more keywords