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Journal articles on the topic 'A Beam of Light'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Quintenz, J. P., D. B. Seidel, M. L. Kiefer, T. D. Pointon, R. S. Coats, S. E. Rosenthal, T. A. Mehlhorn, M. P. Desjarlais, and N. A. Krall. "Simulation codes for light-ion diode modeling." Laser and Particle Beams 12, no. 2 (June 1994): 283–324. http://dx.doi.org/10.1017/s0263034600007746.

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The computational tools used in the investigation of light-ion diode physics at Sandia National Laboratories are described. Applied-B ion diodes are used to generate intense beams of ions and focus these beams onto targets as part of Sandia's inertial confinement fusion program. Computer codes are used to simulate the energy storage and pulse forming sections of the accelerator and the power flow and coupling into the diode where the ion beam is generated. Other codes are used to calculate the applied magnetic field diffusion in the diode region, the electromagnetic fluctuations in the anode-cathode gap, the subsequent beam divergence, the beam propagation, and response of various beam diagnostics. These codes are described and some typical results are shown.

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2

Dajie Huang, Dajie Huang, Wei Fan Wei Fan, Xuechun Li Xuechun Li, and Zunqi Lin Zunqi Lin. "Beam shaping for 1 053-nm coherent light using optically addressed liquid crystal light valve." Chinese Optics Letters 10, s2 (2012): S21406–321409. http://dx.doi.org/10.3788/col201210.s21406.

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3

Palmans, Hugo, and Stanislav M. Vatnitsky. "Beam monitor calibration in scanned light-ion beams." Medical Physics 43, no. 11 (October 5, 2016): 5835–47. http://dx.doi.org/10.1118/1.4963808.

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4

Niu, K., P. Mulser, and L. Drska. "Beam generations of three kinds of charged particles." Laser and Particle Beams 9, no. 1 (March 1991): 149–65. http://dx.doi.org/10.1017/s0263034600002391.

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Analyses are given for beam generations of three kinds of charged particles: electrons, light ions, and heavy ions. The electron beam oscillates in a dense plasma irradiated by a strong laser light. When the frequency of laser light is high and its intensity is large, the acceleration of oscillating electrons becomes large and the electrons radiate electromagnetic waves. As the reaction, the electrons feel a damping force, whose effect on oscillating electron motion is investigated first. Second, the electron beam induces the strong electromagnetic field by its self-induced electric current density when the electron number density is high. The induced electric field reduces the oscillation motion and deforms the beam.In the case of a light ion beam, the electrostatic field, induced by the beam charge, as well as the electromagnetic field, induced by the beam current, affects the beam motion. The total energy of the magnetic field surrounding the beam is rather small in comparison with its kinetic energy.In the case of heavy ion beams the beam charge at the leading edge is much smaller in comparison with the case of light ion beams when the heavy ion beam propagates in the background plasma. Thus, the induced electrostatic and electromagnetic fields do not much affect the beam propagation.

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5

Ulrich, Andreas. "Light emission from particle beam induced plasma: An overview." Laser and Particle Beams 30, no. 2 (March 13, 2012): 199–205. http://dx.doi.org/10.1017/s0263034611000838.

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AbstractExperiments to study the light emission from plasma produced by particle beams are presented. Fundamental aspects in comparison with discharge plasma formation are discussed. It is shown that the formation of excimer molecules is an important process. This paper summarizes various studies of particle beam induced light emission and presents the first results of a direct comparison of light emission induced by electron- and ion beam excitation. Both high energy heavy ion beam and low energy electron beam experiments are described and an overview over applications in the form of light sources, lasers, and ionization devices is given.

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6

ZHONG, WEI-PING. "SPATIOTEMPORAL STRONGLY NONLOCAL SPHERICAL LIGHT BULLETS." Journal of Nonlinear Optical Physics & Materials 22, no. 01 (March 2013): 1350006. http://dx.doi.org/10.1142/s0218863513500069.

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The general spherical beam solution of the three-dimensional (3D) spatiotemporal strongly nonlocal nonlinear (NN) Schrödinger equation in the form of light bullets is presented. The 3D spatiotemporal spherical beams are built by the products of generalized Laguerre polynomials and associated Legendre polynomials. By the choice of a specific integration constant, the spherical beam becomes an accessible soliton, which can exist in various forms. We confirm the existence and stability of these solutions by numerical simulations.

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7

Xu, Yun, Jingbo Sun, Jesse Frantz, Mikhail Shalaev, Wiktor Walasik, Apra Pandey, Jason Myers, Robel Bekele, Alexander Tsukernik, and Jasbinder Litchinitser. "Nonlinear Metasurface for Structured Light with Tunable Orbital Angular Momentum." Applied Sciences 9, no. 5 (March 6, 2019): 958. http://dx.doi.org/10.3390/app9050958.

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Orbital angular momentum (OAM) beams may create a new paradigm for the future classical and quantum communication systems. A majority of existing OAM beam converters are bulky, slow, and cannot withstand high powers. Here, we design and experimentally demonstrate an ultra-fast, compact chalcogenide-based all-dielectric metasurface beam converter which has the ability to transform a Hermite–Gaussian (HG) beam into a beam carrying an OAM at near infrared wavelength. Depending on the input beam intensity, the topological charge carried by the output OAM beam can be switched between positive and negative. The device provides high transmission efficiency and is fabricated by a standard electron beam lithography. Arsenic trisulfide (As 2 S 3 ) chalcogenide glass (ChG) offers ultra-fast and large third-order nonlinearity as well as a low two-photon absorption coefficient in the near infrared spectral range.

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8

DEGIOVANNI, IVO PIETRO, STEFANIA CASTELLETTO, EMILIANO PUDDU, ALESSANDRA ANDREONI, and MARIA BONDANI. "GHOST IMAGING WITH INTENSE CORRELATED LIGHT." International Journal of Quantum Information 05, no. 01n02 (February 2007): 33–36. http://dx.doi.org/10.1142/s0219749907002499.

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We present a new ghost-imaging experiment that is realized by exploiting two intense correlated beams. The beams involved are signal and idler of a seeded parametric downconversion. The peculiarity of this scheme is that the seed field is an intense pseudo-thermal field generated by passing a laser beam through two rotating ground glass plates.

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9

Bluhm, H. J., G. Keßler, and R. R. Petersen. "Light ion beam driven inertial confinement fusion: Requirements and achievements." Laser and Particle Beams 14, no. 4 (December 1996): 655–63. http://dx.doi.org/10.1017/s0263034600010375.

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In this paper we compare the requirements for a light ion beam driven inertial confinement fusion (ICF) reactor with the present achievements in pulsed power technology, ion diode performance, beam transport, and target physics. The largest gap exists in beam quality and repetition rate capability of high-power ion diodes. Beam quality can very likely be improved to a level sufficient for driving a single-shot ignition facility, if the potential of two-stage acceleration is used. Present schemes for repetition rate ion diodes allow either too low power densities or create too large beam divergence. On the other hand, repetitively operating pulsed-power generators meeting the requirements for an ICF reactor driver can be built with present technology. Also, a rather mature target concept has been developed for indirect drive with light ion beams.

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10

Adli, E., S. J. Gessner, S. Corde, M. J. Hogan, and H. H. Bjerke. "Cherenkov light-based beam profiling for ultrarelativistic electron beams." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 783 (May 2015): 35–42. http://dx.doi.org/10.1016/j.nima.2015.02.003.

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11

Lu, Fanfan, Tengxiang Huang, Lei Han, Haisheng Su, Heng Wang, Min Liu, Wending Zhang, Xiang Wang, and Ting Mei. "Tip-Enhanced Raman Spectroscopy with High-Order Fiber Vector Beam Excitation." Sensors 18, no. 11 (November 9, 2018): 3841. http://dx.doi.org/10.3390/s18113841.

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We investigated tip-enhanced Raman spectra excited by high-order fiber vector beams. Theoretical analysis shows that the high-order fiber vector beams have stronger longitudinal electric field components than linearly polarized light under tight focusing conditions. By introducing the high-order fiber vector beams and the linearly polarized beam from a fiber vector beam generator based on an electrically-controlled acoustically-induced fiber grating into a top-illumination tip-enhanced Raman spectroscopy (TERS) setup, the tip-enhanced Raman signal produced by the high-order fiber vector beams was 1.6 times as strong as that produced by the linearly polarized light. This result suggests a new type of efficient excitation light beams for TERS.

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12

Paraipan, Mihaela, Anton A. Baldin, Elina G. Baldina, and Serguey I. Tyutyunikov. "Light Ion Beams for Energy Production in ADS." EPJ Web of Conferences 173 (2018): 04011. http://dx.doi.org/10.1051/epjconf/201817304011.

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A comparative study of the energy efficiency of proton beams with an energy from 0.5 GeV to 4 GeV and light ion beams (7Li, 9Be, 11B, and 12C) with energies from 0.25 AGeV to 1 AGeV in natural and enriched quasi-infinite U target is presented. The numerical results on the particle transport and interaction are obtained using the code Geant4. The following target optimization issues are addressed: the beam window dimensions, and the possibility to use a core from low Z materials. The best solution for ADS from the point of view of the energy gain and miniaturization is obtained for 7Li or 9Be beam with an energy of 0.3–0.4 AGeV and a target with Be core.

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13

Aboudarham, J., and J. C. Henoux. "Electron Beam as Origin of White-Light Solar Flares." International Astronomical Union Colloquium 104, no. 1 (1989): 19–30. http://dx.doi.org/10.1017/s025292110003178x.

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AbstractWe study the effect of chromospheric bombardment by an electron beam during solar flares. Using a semi-empirical flare model, we investigate energy balance at temperature minimum level and in the upper photosphere. We show that non-thermal hydrogen ionization (i.e., due to the electrons of the beam) leads to an increase of chromospheric hydrogen continuum emission, H− population, and absorption of photo-spheric and chromospheric continuum radiation. So, the upper photosphere is radiatively heated by chromospheric continuum radiation produced by the beam. The effect of hydrogen ionization is an enhanced white-light emission both at chromospheric and photospheric level, due to Paschen and H− continua emission, respectively. We then obtain white-light contrasts compatible with observations, obviously showing the link between white-light flares and atmospheric bombardment by electron beams.

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14

ASSANTO, GAETANO, and MARCO PECCIANTI. "ROUTING LIGHT AT WILL." Journal of Nonlinear Optical Physics & Materials 16, no. 01 (March 2007): 37–47. http://dx.doi.org/10.1142/s0218863507003536.

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We present a comprehensive review on the routing of self-confined light-beams in liquid crystals, i.e., generation, propagation and angular steering of self-induced waveguides or spatial solitons in a nonlinear non local dielectric with a large electro-optic response. We describe all-optical routing through soliton-soliton or soliton-beam interactions, as well as voltage-controlled steering in an anisotropic geometry via birefringence or refraction/reflection at a graded interface.

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15

Kuzmanovic, S., A. Mancic, and M. Stojanovic-Krasic. "Effect of a geometric defect on light propagation through a composite linear photonic lattice." Facta universitatis - series: Physics, Chemistry and Technology 13, no. 3 (2015): 163–69. http://dx.doi.org/10.2298/fupct1503163k.

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In this paper we investigated numerically light beam propagation through a one-dimensional composite photonic lattice composed of two structurally different lattices, with a geometric defect emerging at the interface between the two of them. Depending on the initial light beam position with respect to the geometric defect and the transverse tilt of the input beam, different dynamical regimes have been identified. Presented results may be useful for different applications, such as blocking, filtering and transporting light beams through optical media.

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16

Ulrich, A., T. Heindl, R. Krücken, A. Morozov, C. Skrobol, and J. Wieser. "Electron beam induced light emission." European Physical Journal Applied Physics 47, no. 2 (April 17, 2009): 22815. http://dx.doi.org/10.1051/epjap/2009062.

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17

Frolov, V. A., S. A. Fedorov, and A. V. Bazhanov. "Light beam welding (a review)." Welding International 26, no. 11 (November 2012): 876–80. http://dx.doi.org/10.1080/09507116.2011.653173.

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18

Okayama, Hideaki. "Ring Light Beam Deflector: Theory." Optical Review 10, no. 4 (July 2003): 283–86. http://dx.doi.org/10.1007/s10043-003-0283-5.

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19

Chen, Cheng-Huan, Chien-Chuan Chen, and Wei-Chien Liang. "Light Pipe Line Beam Shaper." Optical Review 14, no. 4 (July 2007): 231–35. http://dx.doi.org/10.1007/s10043-007-0231-x.

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20

Apiputikul, Chatchalong, Kheamrutai Thamaphat, Monrudee Ranusawad, and Pichet Limsuwan. "Uncomplicated Setting Apparatus for Measurement of Fluid Flow Rate Using Laser Doppler Technique: Physics Teaching." Advanced Materials Research 770 (September 2013): 366–69. http://dx.doi.org/10.4028/www.scientific.net/amr.770.366.

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Laser Doppler velocimetry (LDV) or laser Doppler anemometry (LDA) is the technique of using the Doppler shift in a laser beam to determine the fluid velocity. In this work, dual beam mode (two incident beams, single observation location) was selected to use. A cost effective and easy module for measurement of water flow rate was designed and constructed. A He-Ne laser with a wavelength of 632.8 nm was used as a light source. The laser was passed through a beam splitter and divided into two beams with identical intensity and coherence. Subsequently, the two laser beams travelled to a focusing lens with a focal length of 100 mm and focused on a center of water flow channel in quartz cuvette with a dimension of 1 × 1 × 5 cm3. The beam angle was set at 4.96°. When the seeding particles, bubbles and microorganism in water, were moving through the intersection point of two beams, the light was scattered. The scattered light was collected by photodetector connected to processing system. The frequency of scatterred light is shifted according to the Doppler shift relations due to effect of Rayleigh scattering. The water flow rate can be calculated from Doppler shift frequency.

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21

Dabolina, Inga, Ausma Vilumsone, and Juris Blums. "Investigation of Textile Materials for Laser Light Beam Scanning." Advanced Materials Research 222 (April 2011): 40–43. http://dx.doi.org/10.4028/www.scientific.net/amr.222.40.

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The scanning of human body as a method for gaining human measurements has several preferences. The gathering of data is possible in a very short time. In comparison to manual measuring methods, scanning acquires a larger amount of measurements. There are several modes of gaining human body measurements using the scanning system: laser scanning, light beam scanning, etc. A research on the laser beam reflection capabilities on different textile materials has been performed. The description of laser reflections has been compared to the Lambert’s law’s characteristics. The matrix of material selection is made in the process of planning the experiment and all possible materials are presented in this matrix. Eight textile materials are chosen for the experimental work: six lingerie and two additional materials. A laser beam with an angle of incidence of 0º and 45º is used to make the experiment. The dependence of the results on the wavelength of laser beams has also been compared.

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22

Петрин, А. Б. "Об эффекте Гуса-Хенхена при наличии возбуждения поверхностных волн в схеме Кречмана." Журнал технической физики 127, no. 10 (2019): 654. http://dx.doi.org/10.21883/os.2019.10.48372.43-19.

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AbstractA theoretical method for investigating reflection of a finite-aperture plane light beam from a flat-layered structure in the Kretschmann scheme is considered. The developed theory is applied for investigating the Goos–Hänchen effect, which arises upon incidence of a linearly polarized light beam with the polarization vector lying in the plane of incidence ( p -polarized beam) and which is that, upon reflection, the incident beam is divided into two close beams of the same polarization. The accuracy of sensors based on this effect is discussed.

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23

Чистяков, Д. В., С. Н. Лосев, С. Х. Абдулразак, В. Ю. Мыльников, Е. А. Когновицкая, Ю. М. Задиранов, Н. Г. Дерягин, В. В. Дюделев, В. И. Кучинский, and Г. С. Соколовский. "Генерация капельных квазибесселевых пучков при помощи полупроводникового лазера." Журнал технической физики 127, no. 11 (2019): 781. http://dx.doi.org/10.21883/os.2019.11.48515.229-19.

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Abstract A method for generation of droplet quasi-Bessel beams using a conical lens with a rounded tip is demonstrated. The study of the longitudinal distribution of the intensity of the obtained quasi-Bessel beam showed that, due to the interference of two wavefronts that occurred as the generating beam passed through the rounded axicon, periodical intensity pulsations that looked like “drops” of light occurred in the resulting beam. These light beams can be used for micromanipulation of biological objects and in super-resolution microscopy. The application of an axicon with a rounded tip for generation of a droplet beam allows considerable simplification and miniaturization of the experimental setup, which paves the way for multiple practical applications.

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24

Shi, Xuguang. "Fractional orbital angular momentum of light beams by topological trajectory." Journal of Nonlinear Optical Physics & Materials 24, no. 02 (June 2015): 1550025. http://dx.doi.org/10.1142/s0218863515500253.

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We derive a rigorous quantum formula called topological trajectory to describe orbital angular momentum (OAM) index based on linear momentum density of Laguerre–Gauss (L–G) light beam. By considering the correspondence between optics and quantum theory, we construct a coherent state from two L–G modes light beam. The light beams with fractional OAM are described by the coherent state. By making use of topological trajectory, we present the conditions that OAM index is fractional.

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25

Lekner, John. "Tight focusing of light beams: a set of exact solutions." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, no. 2195 (November 2016): 20160538. http://dx.doi.org/10.1098/rspa.2016.0538.

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Exact solutions of Maxwell's equations representing light beams are explored. The solutions satisfy all of the physical requirements of causal propagation and of energy, momentum and angular momentum conservation. A set of solutions can be found from a proto-beam by an imaginary translation along the beam direction. The proto-beam is given analytically in terms of the Bessel functions J 0 , J 1 and the Lommel functions U 0 , U 1 , or equivalently in terms of products of the spherical Bessel functions and Legendre polynomials. The complex wavefunction has rings of zeros in the focal plane. Localization of the focal region is to within about one half of the vacuum wavelength.

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26

Zhang, Jun Jie, and Qiu Yuan Zhang. "Numerical Simulation on Beating Capacity of Steel Reinforced Light Aggregate Concrete Beam." Applied Mechanics and Materials 351-352 (August 2013): 148–51. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.148.

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For a better analysis of the deformation of the steelreinforced light aggregate concrete member, adopt asymmetric loading mode,carry on numerical simulation of bearing capacity of steel reinforced lightaggregate concrete beams. The simulation results show that the: In theasymmetric loads, longitudinal reinforcement of the bottom of the beam both ends of the constrained position, due tothe presence of constraints, make it tensile stress,in the 250mmposition is tensile stress minimum, compressive stress correspondingly larger.In the central beam downward bending deformation, this part of the lower edgeof the beam longitudinal reinforcement tensile stress.

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27

Okada, Toshio, and Winfried Schmidt. "Two-stream and filamentation instabilities for a light ion beam—plasma system." Journal of Plasma Physics 37, no. 3 (June 1987): 373–82. http://dx.doi.org/10.1017/s0022377800012253.

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Electrostatic two-stream and electromagnetic filamentation instabilities for a light ion beam penetrating a plasma are investigated. The dispersion relations of these instabilities including the effect of plasma heating by the ion beam are solved analytically and numerically. Stability conditions are derived for propagation through a plasma. Attention is paid to the finite size effects of beams with small diameters of the order 0·1 cm typical for pinched gas discharges. The results are illustrated by plotting stability boundaries for a 100 keV proton beam propagating through a plasma.

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28

de Magalhães Filho, Thales Ribeiro, Karin de Mello Weig, Marcelo Martins Werneck, Célio Albano da Costa Neto, and Marysilvia Ferreira da Costa. "Odontological light-emitting diode light-curing unit beam quality." Journal of Biomedical Optics 20, no. 5 (May 13, 2015): 055005. http://dx.doi.org/10.1117/1.jbo.20.5.055005.

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29

Bian, Jian-Ming, Vladimir Bytev, Ying Chen, Hong-Ying Jin, Shan Jin, Hu Qin, Xiao-Yan Shen, et al. "Light Hadron Physics." International Journal of Modern Physics A 24, supp01 (May 2009): 169–72. http://dx.doi.org/10.1142/s0217751x09046795.

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Our knowledge about the structure of matter and the nature of the interactions between its constituent components follows a hierarchy that closely tracks the evolution of experimental measurements from low to higher and higher energies. For example, with an electron beam of a given energy, one can access the microscopic structure of matter at length scales corresponding to the de-Brogie wave length of the electrons that are being used: λ = 2π × 197.3 Mev · fm /Eγ, were Eγ is the energy of the photon that is exchanged in the experimentally observed process. As the energy of the beams that are available get higher and higher, the sizes of objects that can be probed get smaller and smaller…

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30

Chen, Xi, W. W. Heidbrink, M. A. Van Zeeland, G. J. Kramer, D. C. Pace, C. C. Petty, M. E. Austin, et al. "Using neutral beams as a light ion beam probe (invited)." Review of Scientific Instruments 85, no. 11 (November 2014): 11E701. http://dx.doi.org/10.1063/1.4889733.

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31

Gao, Lu, Ke Xiao, Hanquan Song, and Xiaoman Qi. "Thermal Light Longitudinal Correlated Imaging with Random Orthogonal Matching Pursuit Algorithm." International Journal of Pattern Recognition and Artificial Intelligence 32, no. 12 (August 27, 2018): 1854030. http://dx.doi.org/10.1142/s0218001418540307.

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A thermal light correlated longitudinal imaging experiment is proposed. The quasi-thermal light beam is split into two beams, a test beam and a reference beam, respectively. The light in the test beam is scattered by two amplitude objects with a specific longitudinal distance between them, while the light of the reference beam travels uninterrupted. At the end of the test and reference beams, two charge-coupled detectors (CCDs) are used to measure the intensity of the optical field. Through intensity correlation measurement the images of the two detected objects can be achieved simultaneously, only if the distance between the objects is less than the longitudinal coherent length. The theoretical analysis shows that the longitudinal coherent length is determined by both the transverse size of the incoherent thermal light source and the length of the optical path. The quality of the correlated images of the two objects is improved greatly by making use of the orthogonal matching pursuit (OMP) and the proposed variant random orthogonal matching pursuit (Random-OMP) algorithms. The experimental results show that the Random-OMP algorithm is more effective than the OMP algorithm for increasing both the visibility and continuity of the images. The experimental scenario can mimic an optical tomography imaging system, and the two objects with longitudinal distance can be taken as the two transverse layers of a three-dimensional object. The proposed Random-OMP algorithm is effective for improving the quality of the tomography image and has potential value in optical tomography imaging technology using incoherent light sources.

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Nicholas, D. J., and S. G. Sajjadi. "The effect of light filamentation on uniformity of energy deposition in laser plasmas." Journal of Plasma Physics 41, no. 2 (April 1989): 209–18. http://dx.doi.org/10.1017/s0022377800013799.

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The detailed behaviour of a beam of light propagating through a fully ionized plasma is studied near the critical density. Transient effects in the laser beam and plasma are included by taking into account, in a self-consistent manner, the proper motion of the plasma in an intense electromagnetic field. Parameters of the laser beam and plasma conditions are studied that prove most beneficial in providing a uniform deposition of energy. The behaviour of the light beams near the critical density at the three wavelengths 1054 nm, 527 nm and 351 nm are compared.

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33

Dar, Jehangir. "Solar splitting day-lighting system “SolsDays”: the first beam splitting day-lighting system." Smart and Sustainable Built Environment 9, no. 2 (August 30, 2019): 130–43. http://dx.doi.org/10.1108/sasbe-06-2018-0035.

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Purpose The purpose of this paper is to describe the first and novel beam splitting day-lighting system possessing highest possible solar transmission efficiency to provide illumination to the core and underground areas of any structure/building. Design/methodology/approach In this system, by using a number of individually pointable thin and light optical elements mounted on a top of structure/building, the solar light is concentrated. The concentrated beam is focussed to a secondary reflecting element which directs it to a beam splitter while passing through a Fresnel lens and a horizontal solar pipe. The beam splitter located inside the structure/building splits the solar beam into a number of secondary beams using a special arrangement of a number of inbuilt light guiding optical elements inside the beam splitter. The beam splitter produces a desired number of beams which are then redirected to the beam diffusers with the help of the solar pipe and the solar pipe joint which deflects the light at the angle of 90°. Findings The system considers the use of highly sophisticated and the highly efficient optical elements so that to attain the highest possible end-to-end efficiency of the system. The system has the highest potential to transport the solar energy to larger distances than all the available day-lighting systems and possesses the potential to be used for underground human colonisation. Research limitations/implications The widespread adoption of such a system could substantially reduce energy consumption worldwide, which would contribute to bring down the increasing slope in the graph of greenhouse gases. Originality/value The paper presents the novel beam splitting day-lighting system.

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34

Nairat, Mazen. "Axial Angular Momentum of Bessel Light." Photonics Letters of Poland 10, no. 1 (March 31, 2018): 23. http://dx.doi.org/10.4302/plp.v10i1.787.

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Both linear and angular momentum densities of Bessel, Gaussian-Bessel, and Hankel-Bessel lasers are determined. Angular momentum of the three Bessel beams is illustrated at linear and circular polarization. Axial Angular momentum is resolved in particular interpretation: the harmonic order of the physical light momentum. Full Text: PDF ReferencesG. Molina-Terriza, J. Torres, and L. Torner, "Twisted photons", Nature Physics 3, 305 - 310 (2007). CrossRef J Arlt, V Garces-Chavez, W Sibbett, and K Dholakia "Optical micromanipulation using a Bessel light beam", Opt. Commun., 197, 4-6, (2001). CrossRef L. Ambrosio and H. Hernández-Figueroa, "Gradient forces on double-negative particles in optical tweezers using Bessel beams in the ray optics regime", Opt Exp, 18, 23 (2010). CrossRef I. Litvin, A. Dudley and A. Forbes, "Poynting vector and orbital angular momentum density of superpositions of Bessel beams", Opt Exp, 19, 18 (2011). CrossRef K Volke-Sepulveda, V Garcés-Chávez, S Chávez-Cerda, J Arlt and K Dholakia "Orbital angular momentum of a high-order Bessel light beam" , JOP B 4 (2). 2002. CrossRef M. Verma, S. Pal, S. Joshi, P. Senthilkumaran, J. Joseph, and H Kandpal, "Singularities in cylindrical vector beams", Jou. of Mod. Opt., 62 (13), 2015. CrossRef R. Borghi, M. Santarsiero, and M. Porras, "Nonparaxial Bessel?Gauss beams", J. Opt. Soc. Am. A, 18 (7) (2011). CrossRef L. Allen, M. Beijersbergen, R. Spreeuw, and J. Woerdman, "Orbital angular momentum of light and the transformation of Laguerre-Gaussian Laser modes", Phys Rev A, 45 (11): 8185-8189 (1992). CrossRef D. Mcglion and K. Dholakia, "Bessel beams: diffraction in a new light", Cont. Phys, 46(1) 15 ? 28. (2005). CrossRef F. Gori, G. Guattari and C. Padovani," Bessel-Gauss Beams", Opt. Commun., 64, 491, (1987). CrossRef V. Kotlyar, A. Kovalev, and A. Soifer, "Hankel?Bessel laser beams" J. Opt. Soc. Am. A, 29 (5) (2012). CrossRef L. Allen and M. Babiker "Spin-orbit coupling in free-space Laguerre-Gaussian light beams", Phys. Rev. A 53, R2937. CrossRef

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Khajavi, Behzad, Junior Ureta, and Enrique Galvez. "Determining Vortex-Beam Superpositions by Shear Interferometry." Photonics 5, no. 3 (July 14, 2018): 16. http://dx.doi.org/10.3390/photonics5030016.

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Optical modes bearing optical vortices are important light systems in which to encode information. Optical vortices are robust features of optical beams that do not dissipate upon propagation. Thus, decoding the modal content of a beam is a vital component of the process. In this work, we present a method to decode modal superpositions of light beams that contain optical vortices. We do so using shear interferometry, which presents a simple and effective means of determining the vortex content of a beam, and extract the parameters of the component vortex modes that constitute them. We find that optical modes in a beam are easily determined. Its modal content can be extracted when they are of comparable magnitude. The use of modes of well-defined topological charge, but not well-defined radial-mode content, such as those produced by phase-only encoding, are much easier to diagnose than pure Laguerre–Gauss modes.

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Prado, Rocío Pérez de, Sebastián García-Galán, José Enrique Muñoz-Expósito, and Adam Marchewka. "Computer-Aided Laser-Fiber Output Beam 3D Spatial and Angular Design." Symmetry 12, no. 1 (January 2, 2020): 83. http://dx.doi.org/10.3390/sym12010083.

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Multiple laser beams and single-mode optical fibers output can be approximated by assuming that the emitted light has a symmetrical Gaussian intensity profile, which corresponds to the transverse electromagnetic mode (TEM00), which is designated as a Gaussian beam. Current free-accessible design tools are limited to the spatial analysis of the beams, in general, and to the intensity, in particular, and to the graphical visualization in 2D with very limited options. In this work, a novel a computer-aided laser-fiber output beam TEM00 designer, CATEM00, is presented based on the 3D representations typically provided by camera beam profilers, and on the fundamentals of the wave theory of light, including diverse flexibility capabilities for graphical manipulation and parameter comprehension both in terms of spatial behavior and in angular confinement. It must be highlighted that not only is the spatial limitation design of light impact relevant in TEM00 applications but, also, the angle with which the light reaches the target. Hence, the availability of capabilities of phase design in TEM00 following the paraxial limitations is highly convenient. Results and discussion in terms of intensity, power, divergence and wave fronts are presented considering a set of study cases, showing its coherence with Gaussian beam theory.

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Laksono, Pranoto Budi. "A STUDY OF THE INFLUENCE OF 650 nm LASER INTERFERENCE ON VISIBLE LASER LIGHT COMMUNICATION SYSTEM." TEKNOKOM 4, no. 2 (September 1, 2021): 60–65. http://dx.doi.org/10.31943/teknokom.v4i2.66.

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Visible Laser Light Communication System (VLLC) is a wireless communication system, using laser as the medium. In the data transfer process, it is possible to have optical interference where 2 laser beams coincide with one point on the reflector. Research on the effect of laser source interference has been carried out by several researchers including mitigation actions to reduce its effects. This experiment uses 2 optical distance sensors that produce a laser with a wavelength of 650 nm with a power <=4.1 mW and with the direction of the laser beam both of them cross each other. To determine the effect of the interference of two laser beams when crossing the communication process in the visible light communication system, a reflector is used which can capture the two laser beams and the reflector can be shifted gradually so that a condition can be obtained where the two laser beams meet at one point. From the measurements made at the points after the laser beam crossing, the measurements at the point where the beam crossed, and the measurements at the points before the beam crossing, it was obtained data, at the exact point where the laser beam crossed the interference occurred, which is indicated by unstable output voltage of the two lasers, so that communication at the point of intersection is disrupted. However, if outside the point of contact both before and after the point of contact, interference and communication systems will not occur.

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Izzo, Luca, Massimo Della Valle, and Lorenzo Amati. "To BEam or not to BEam. . ." Proceedings of the International Astronomical Union 10, S313 (September 2014): 392–93. http://dx.doi.org/10.1017/s1743921315002586.

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Wang Jiaan, 王加安, 王馨兰 Wang Xinlan, 郭林炀 Guo Linyang, 车. 英. Che Ying, and 尹. 鹏. Yin Peng. "Light Intensity Scintillation of Airy Beam." Acta Optica Sinica 37, no. 6 (2017): 0626001. http://dx.doi.org/10.3788/aos201737.0626001.

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Hirsch, L., P. Tardy, G. Wantz, N. Huby, P. Moretto, L. Serani, F. Natali, B. Damilano, J. Y. Duboz, and J. L. Reverchon. "Light-ion beam for microelectronic applications." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 240, no. 1-2 (October 2005): 265–70. http://dx.doi.org/10.1016/j.nimb.2005.06.127.

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Hillion, Pierre. "Light beam shifts in total reflection." Optics Communications 266, no. 1 (October 2006): 336–41. http://dx.doi.org/10.1016/j.optcom.2006.04.071.

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Hettel, R. O. "Beam stability at light sources (invited)." Review of Scientific Instruments 73, no. 3 (March 2002): 1396–401. http://dx.doi.org/10.1063/1.1435812.

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Couprie, Marie-Emmanuelle. "Twisted light from an electron beam." Nature Physics 9, no. 9 (September 2013): 531–32. http://dx.doi.org/10.1038/nphys2742.

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Baetz, W., W. Holzapfel, H. Dietrich, and B. Nath. "Beam configuration for light sheet application." Measurement 38, no. 1 (July 2005): 42–52. http://dx.doi.org/10.1016/j.measurement.2005.02.004.

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Bouldja, Nacera, Marc Sciamanna, and Delphine Wolfersberger. "Slow light with photorefractive beam fanning." Optics Express 28, no. 4 (February 14, 2020): 5860. http://dx.doi.org/10.1364/oe.386254.

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Okayama, Hideaki. "Phase Control: Ring Light Beam Deflector." Optics and Photonics News 14, no. 12 (December 1, 2003): 29. http://dx.doi.org/10.1364/opn.14.12.000029.

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Khan, Sameen Ahmed. "Quantum Methods in Light-Beam Optics." Optics and Photonics News 27, no. 12 (December 1, 2016): 47. http://dx.doi.org/10.1364/opn.27.12.000047.

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Petrov, Nikolai I. "Remote focusing of a light beam." Laser Physics Letters 13, no. 1 (November 24, 2015): 015101. http://dx.doi.org/10.1088/1612-2011/13/1/015101.

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Oparin, M. I., V. A. Frolov, A. N. Svobodov, V. S. Mamaev, and N. S. Pronin. "Light beam welding high‐manganese steels." Welding International 6, no. 1 (January 1992): 32–33. http://dx.doi.org/10.1080/09507119209548138.

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Michalak, Leszek, and Bogdan Adamczyk. "Light simulation of molecular beam epitaxy." Vacuum 42, no. 12 (January 1991): 735–39. http://dx.doi.org/10.1016/0042-207x(91)90169-j.

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