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Journal articles on the topic 'Laser beam propagation'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Kumar, S., P. K. Gupta, R. K. Singh, R. Uma, and R. P. Sharma. "Self-compression of two co-propagating laser pulse having relativistic nonlinearity in plasma." Laser and Particle Beams 35, no. 4 (2017): 722–29. http://dx.doi.org/10.1017/s0263034617000787.

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AbstractThe study proposes a semi-analytical model for the pulse compression of two co-propagating intense laser beams having Gaussian intensity profile in the temporal domain. The high power laser beams create the relativistic nonlinearity during propagation in plasma, which leads to the modification of the refractive index profile. The co-propagating laser beams get self- compressed by virtue of group velocity dispersion and induced nonlinearity. The induced nonlinearity in the plasma broadens the frequency spectrum of the pulse via self-phase modulation, turn to shorter the pulse duration a

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2

Bélanger, Pierre-André, Yves Champagne, and Claude Paré. "Beam propagation factor of diffracted laser beams." Optics Communications 105, no. 3-4 (1994): 233–42. http://dx.doi.org/10.1016/0030-4018(94)90721-8.

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3

Singh, Vijay. "Modulation instability of two laser beams in plasma." Laser and Particle Beams 31, no. 4 (2013): 753–58. http://dx.doi.org/10.1017/s0263034613000748.

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AbstractIn the present paper, spatial amplitude modulation instability arising due to relativistic self-phase modulation and relativistic cross phase modulation of two co-propagating, linearly polarized laser beams (with arbitrary relative polarization) interacting with homogeneous plasma, has been studied. Wave equations including finite perturbation length effects, group velocity dispersion, and coupled nonlinear source term have been set up. Coupled dispersion relation for the two laser beams has been derived and solved numerically. The growth rate of modulation instability has been obtaine

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4

Saghafi, S., M. J. Withford, and J. A. Piper. "Propagation of laser beams formed by unstable resonators with different magnifications." Canadian Journal of Physics 84, no. 3 (2006): 241–52. http://dx.doi.org/10.1139/p06-013.

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Laser beams generated from high-magnification on-axis unstable resonators using hard-edged axial scraper mirrors and output couplers consisting of axial spot reflectors typically have an annular distribution in the near field (i.e., a flat-top profile with a hole in the middle for an axially coupled beam). We employ a new model, based on the flattened Gaussian beam (FGB) concept, to describe the propagation of such annular near-field beams. The superposition of two FGBs, whose flatness and steepness of edges are controlled by defined parameters (i.e., the beam width and the order), is used to

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5

VARSHNEY, MEENU ASTHANA, SHALINI SHUKLA, SONU SEN, and DINESH VARSHNEY. "Relativistic cross-focusing of extraordinary and ordinary modes in a magnetoactive plasma." Journal of Plasma Physics 79, no. 5 (2013): 953–61. http://dx.doi.org/10.1017/s002237781300086x.

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AbstractThis paper presents the effect of self-focusing on a circularly polarized beam propagating along the static magnetic field when the extraordinary and ordinary modes are present simultaneously for relativistic intensities. The nonlinearity in the dielectric function arises on account of the relativistic variation of mass, which leads to the mutual coupling of the two modes that support the self-focusing of each other. The propagation and focusing of the first mode affects the propagation and focusing of the second mode. The fact that the two modes are laser-intensity dependent leads to

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6

Hashemipour, Seyed Hamid, A. Salman Ogli, and Nasim Mohammadian. "The Effect of Atmosphere Disturbances on Laser Beam Propagation." Key Engineering Materials 500 (January 2012): 3–8. http://dx.doi.org/10.4028/www.scientific.net/kem.500.3.

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In this article, we probe the atmosphere disturbance such as Attenuation, Scattering, turbulence and thermal blooming on the laser beam propagated it. For investigating, we designed software which gives the vertically propagation characteristics of a general-type beam in atmosphere, based on the Huygens–Fresnel principle. When the required source and medium parameters are entered, the simulator yields the average intensity profile along the propagation axis in a video format. The results show that the peak value of the average intensity can be astonishingly affected by atmospheric turbulence,

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7

Gupta, Naveen. "Second harmonic generation of q-Gaussian laser beam in plasma channel created by ignitor heater technique." Laser and Particle Beams 37, no. 2 (2019): 184–96. http://dx.doi.org/10.1017/s0263034619000193.

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AbstractThis paper presents a scheme for second harmonic generation (SHG) of q-Gaussian laser beam in plasma channel created by ignitor heater technique. The ignitor beam creates plasma by tunnel ionization of air. The heater beam heats the plasma electrons and establishes a parabolic density profile. The third beam (q-Gaussian beam) is guided in this plasma channel under the combined effects of density nonuniformity of the plasma channel and relativistic mass nonlinearity of the plasma electrons. The propagation of q-Gaussian laser beam through the plasma channel excites an electron plasma wa

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8

Sen, Sonu, Meenu Asthana Varshney, and Dinesh Varshney. "Relativistic Propagation of Linearly/Circularly Polarized Laser Radiation in Plasmas." ISRN Optics 2013 (September 2, 2013): 1–8. http://dx.doi.org/10.1155/2013/642617.

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Paraxial theory of relativistic self-focusing of Gaussian laser beams in plasmas for arbitrary magnitude of intensity of the beam has been presented in this paper. The nonlinearity in the dielectric constant arises on account of relativistic variation of mass. An appropriate expression for the nonlinear dielectric constant has been used to study laser beam propagation for linearly/circularly polarized wave. The variation of beamwidth parameter with distance of propagation, self-trapping condition, and critical power has been evaluated. The saturating nature of nonlinearity yields two values of

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9

SUBBARAO, D., H. SINGH, R. UMA, and S. BHASKAR. "Computer simulation of laser-beam self-focusing in a plasma." Journal of Plasma Physics 61, no. 3 (1999): 449–67. http://dx.doi.org/10.1017/s0022377899007540.

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Laser-beam or soliton propagation is best modelled for fast computation using a split-step Fourier method based on an orthogonal transform technique known as the beam-propagation method. The beam-propagation split-step Fourier-transform technique in one and two dimensions for the propagation of a soliton or laser beam respectively in a nonlinear plasma and a split-step Hankel-transform-based algorithm for cylindrical-beam propagation close to circular cross-sectional symmetry and its computational implementation are discussed. Attention is particularly focused on the verification of the paraxi

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10

Singh, Arvinder, and Naveen Gupta. "Beat wave excitation of electron plasma wave by coaxial cosh-Gaussian laser beams in collisional plasma." Laser and Particle Beams 33, no. 4 (2015): 621–32. http://dx.doi.org/10.1017/s0263034615000646.

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AbstractThis paper presents a scheme for beat wave excitation of an electron plasma wave (EPW) by cross-focusing of two intense cosh-Gaussian (ChG) laser beams in an under dense collisional plasma. The plasma wave is generated on account of beating of two ChG laser beams of frequencies ω1 and ω2. Starting from Maxwell's equations, coupled differential equations governing the evolution of spot size of laser beams with distance of propagation have been derived by using Moment theory approach in Wentzel–Kramers–Brillouin approximation. The collisional nonlinearity depends not only on the intensit

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11

Fowler, Alex J., and M. Pinar Menguc. "Propagation of Focused and Multibeam Laser Energy in Biological Tissue." Journal of Biomechanical Engineering 122, no. 5 (2000): 534–40. http://dx.doi.org/10.1115/1.1289993.

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The results of a Monte Carlo simulation of laser beam propagation in turbid media are presented. The study was performed to determine whether using a focused beam or multiple beams instead of a single collimated beam could improve subsurface laser energy delivery in biological tissue. A parametric study was carried out to determine both the laser fluence at a target depth and the ratio of fluence at the target over surface fluence as a function of tissue properties and the mode of energy delivery. It was found that the reduced scattering coefficient was the primary determinant as to whether mu

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12

Jiang, I. Min, Yu Jen Chen, Wen Chi Hung, et al. "Laser Beam Induces Reorientation in Nematic Liquid Crystals." Key Engineering Materials 428-429 (January 2010): 224–27. http://dx.doi.org/10.4028/www.scientific.net/kem.428-429.224.

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Nematic liquid crystals (NLCs) can be easily reoriented by the laser beam at the temperature closed to the nematic–isotropic phase transition (TNI). At the temperature closed to TNI, the propagating mode of laser beam and the optically induced phase transition were explored by using a microscopic conoscope technique. This investigation demonstrates the formation of soliton at particular beam propagation modes. The interaction between nematic liquid crystals and the laser beam with different polarizations showed the nonlinearity in optical alignment.

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13

Raitsin, A. M., and M. V. Ulanovskii. "Correct measurement methodology spatial-energy characteristics of laser beams." Metrologiya, no. 2 (July 4, 2021): 4–19. http://dx.doi.org/10.32446/0132-4713.2021-2-4-19.

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A methodology for correct measurements of the spatial and energy characteristics of a laser beam is considered, based on the determination of the initial moments of the spatial intensity distribution in the beam cross section. The classification of radiation fields participating in the measuring process is given: emitted, measured and measured. It is shown that ISO 11146:2005 “Lasers and laser-related equipment. Test methods for laser beam widths, divergence angles and beam propagation ratios, Part 1-3” for measuring the spatial and energy characteristics of laser beams leads to incorrect meas

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14

Barrett, J. L., and P. A. Budni. "Laser beam propagation through strong turbulence." Journal of Applied Physics 71, no. 3 (1992): 1124–27. http://dx.doi.org/10.1063/1.351276.

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15

Shealy, David L., and John A. Hoffnagle. "Laser beam shaping profiles and propagation." Applied Optics 45, no. 21 (2006): 5118. http://dx.doi.org/10.1364/ao.45.005118.

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16

Gao Fengbin, 高凤彬, 赵长明 Zhao Changming, 关哲 Guan Zhe, 张海洋 Zhang Haiyang, 杨苏辉 Yang Suhui, and 王予 Wang Yu. "Laser Beam Propagation Process in Atmosphere." Laser & Optoelectronics Progress 54, no. 4 (2017): 041404. http://dx.doi.org/10.3788/lop54.041404.

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17

Searles, Stuart K., G. A. Hart, J. A. Dowling, and S. T. Hanley. "Laser beam propagation in turbulent conditions." Applied Optics 30, no. 4 (1991): 401. http://dx.doi.org/10.1364/ao.30.000401.

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18

Gupta, Ruchika, Prerana Sharma, M. Rafat, and R. P. Sharma. "Cross-focusing of two hollow Gaussian laser beams in plasmas." Laser and Particle Beams 29, no. 2 (2011): 227–30. http://dx.doi.org/10.1017/s026303461100019x.

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AbstractThis article presents the cross-focusing of two high power dark hollow Gaussian beams in plasma when relativistic nonlinearity is operative. A paraxial like approach has been used in the present analysis. In this study, the non-linear dielectric function has been expanded in terms of radial distance from the maximum of the irradiance, rather than from the axis, as is the case of Gaussian beams. The nature of propagation of a hollow Gaussian beam propagating in plasmas has been studied under the influence of relativistic non-linearity. The effect on the order (n) of hollow Gaussian beam

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19

Ma, Huimin, Pengfei Zhang, Jinghui Zhang, et al. "A Fast Calculation Method of Far-Field Intensity Distribution with Point Spread Function Convolution for High Energy Laser Propagation." Applied Sciences 11, no. 10 (2021): 4450. http://dx.doi.org/10.3390/app11104450.

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The turbulence effect, thermal blooming effect, laser beam aberration, platform jitter, and other effects in the process of high energy laser propagation in the atmosphere will cause serious degradation of laser beam quality, which will have a negative impact on the actual application of laser propagation engineering. It is important in the engineering application of high-energy laser propagation to evaluate the far-field intensity distribution quickly. Based on the optical transfer function (OTF) theory of imaging system, the propagation process of high-energy lasers is modeled as the imaging

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20

Wu, Zhong, Yong Kang Zhang, Yun Xia Ye, and Hai Bing Guan. "The Development and the Present Status of the Flat-Topped Beam." Key Engineering Materials 464 (January 2011): 419–23. http://dx.doi.org/10.4028/www.scientific.net/kem.464.419.

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As rapid advance in the laser and the laser technology, more and more lasers have been used in different application fields, which have different demands to the energy distribution of the laser spot. Flat-topped light beam is a type of beam with uniform radiance, so it has been widely applied in all kinds of field such as the material processing. The current research on the flat-topped beam mainly focused on how to obtain the beam and its propagation properties. In this paper, four experimental methods on how to obtain the flat-topped beam are summarized, among of which the beam shaping is emp

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21

Kotlyar, V. V., A. A. Kovalev, and E. G. Abramochkin. "Asymmetric hypergeometric laser beams." Computer Optics 43, no. 5 (2019): 735–40. http://dx.doi.org/10.18287/2412-6179-2019-43-5-735-740.

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Here we study asymmetric Kummer beams (aK-beams) with their scalar complex amplitude being proportional to the Kummer function (a degenerate hypergeometric function). These beams are an exact solution of the paraxial propagation equation (Schrödinger-type equation) and obtained from the conventional symmetric hypergeometric beams by a complex shift of the transverse coordinates. On propagation, the aK-beams change their intensity weakly and rotate around the optical axis. These beams are an example of vortex laser beams with a fractional orbital angular momentum (OAM), which depends on four pa

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22

Zhou, Tianhua, Jian Ma, Tingting Lu, et al. "Simulation and verification of pulsed laser beam propagation underwater using Markov chains [Invited]." Chinese Optics Letters 17, no. 10 (2019): 100003. http://dx.doi.org/10.3788/col201917.100003.

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23

Urunkar, T. U., S. D. Patil, A. T. Valkunde, B. D. Vhanmore, K. M. Gavade, and M. V. Takale. "On the exploration of graphical and analytical investigation of effect of critical beam power on self-focusing of cosh-Gaussian laser beams in collisionless magnetized plasma." Laser and Particle Beams 36, no. 2 (2018): 254–60. http://dx.doi.org/10.1017/s0263034618000253.

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AbstractThe paper gives graphical and analytical investigation of the effect of critical beam power on self-focusing of cosh-Gaussian laser beams in collisionless magnetized plasma under ponderomotive non-linearity. The standard Akhmanov's parabolic equation approach under Wentzel–Kramers–Brillouin (WKB) and paraxial approximations is employed to investigate the propagation of cosh-Gaussian laser beams in collisionless magnetized plasma. Especially, the concept of numerical intervals and turning points of critical beam power has evolved through graphical analysis of beam-width parameter differ

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24

Sharma, R. P., and P. Sharma. "Effect of laser beam filamentation on second harmonic spectrum in laser plasma interaction." Laser and Particle Beams 27, no. 1 (2009): 157–69. http://dx.doi.org/10.1017/s0263034609000226.

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AbstractThis paper presents the laser beam filamentation at ultra relativistic laser powers, when the paraxial restriction on the beam is relaxed during the filamentation process. On account of laser beam intensity gradient and background density gradients in filamentary regions, the electron plasma wave (EPW) at pump wave frequency is generated. This EPW is found to be highly localized because of the laser beam filaments. The interaction of the incident laser beam with the EPW leads to the second harmonic generation. The second harmonic spectrum has also been studied in detail, and its correl

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25

Huang, T. W., C. T. Zhou, and X. T. He. "Self-shaping of a relativistic elliptically Gaussian laser beam in underdense plasmas." Laser and Particle Beams 33, no. 2 (2015): 347–53. http://dx.doi.org/10.1017/s026303461500018x.

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AbstractSelf-shaping and propagation of intense laser beams of different radial profiles in plasmas is investigated. It is shown that when a relativistic elliptically Gaussian beam propagates through an underdense plasma, its radial profile will self-organize into a circularly symmetric self-similar smooth configuration. Such self-similar propagation can be attributed to a soliton-like structure of the laser pulse. The anisotropic electron distribution results in a circular electric field that redistributes the electrons and modulates the laser pulse to a circular radial shape.

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26

Loriette, Vincent, and Philippe Gleyzes. "Simulation of laser beam propagation through a Fabry-Perot interferometer." Journal of Optics 28, no. 1 (1997): 6–12. http://dx.doi.org/10.1088/0150-536x/28/1/003.

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27

Arpali, Çağlar, Yahya Baykal, and Cem Nakiboğlu. "Arbitrary laser beam propagation in free space." Optics Communications 282, no. 16 (2009): 3216–22. http://dx.doi.org/10.1016/j.optcom.2009.05.034.

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28

Lü, Baida, and Hong Ma. "Beam propagation properties of radial laser arrays." Journal of the Optical Society of America A 17, no. 11 (2000): 2005. http://dx.doi.org/10.1364/josaa.17.002005.

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29

LI Bo, 李波, 王挺峰 WANG Ting-feng, 王弟男 WANG Di-nan, 田玉珍 TIAN Yu-zhen, and 安雪晶 AN Xue-jing. "Simulation of laser beam propagation through turbulence." Chinese Journal of Optics and Applied Optics 5, no. 3 (2012): 289–95. http://dx.doi.org/10.3788/co.20120503.0289.

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30

Sennaroglu, Alphan, Fatihcan M. Atay, and Attila Askar. "Laser beam propagation in a saturable absorber." Journal of the Optical Society of America B 14, no. 10 (1997): 2577. http://dx.doi.org/10.1364/josab.14.002577.

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31

Jones, R. D., and T. R. Scott. "Error propagation in laser beam spatial parameters." Optical and Quantum Electronics 26, no. 1 (1994): 25–34. http://dx.doi.org/10.1007/bf00573898.

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32

Gökçe, Muhsin Caner, Yahya Baykal, and Yalçın Ata. "Laser array beam propagation through liver tissue." Journal of Visualization 23, no. 2 (2020): 331–38. http://dx.doi.org/10.1007/s12650-020-00630-5.

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33

Singh, Navpreet, and Arvinder Singh. "The effect of plasma channel on the self-distortion of laser pulse propagating through the collisionless plasma channel." Journal of Nonlinear Optical Physics & Materials 23, no. 03 (2014): 1450027. http://dx.doi.org/10.1142/s0218863514500271.

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This paper presents an investigation of the laser pulse distortion/breakup and the effect of the plasma channel on the laser propagation through the collisionless plasma. Moment theory has been used to derive differential equations of the beam width parameter of the laser propagating through uniform homogenous plasma and preformed plasma channel having parabolic density profile. Differential equations have been set up and solved numerically by using Runge Kutta method. From analysis, it is observed that the low intensity front and rear parts of the laser pulse get defocused/diffracted while th

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34

Nguyen, Thanh-Phuong. "Characterization of High-power DFB-MOPA Diode Lasers Emitting at 1064 nm." Communications in Physics 29, no. 1 (2019): 47. http://dx.doi.org/10.15625/0868-3166/29/1/13221.

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Detail characterization of the such laser diode is important for the applications. Electro-Optical and spectral characteristics of the high power 1064 nm DFB-MOPA lasers are investigated at room temperature as function of injection current. Beam quality is characterized by waist diameter and far-field divergence angle versus average optical output power. Beam propagation ratio M2 is defined at difference intensity levels from lateral beam profile giving more detail laser behaviors at high power.

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35

Doronin, Alexander, Nicolás Vera, Juan Staforelli, Pablo Coelho, and Igor Meglinski. "Propagation of Cylindrical Vector Laser Beams in Turbid Tissue-Like Scattering Media." Photonics 6, no. 2 (2019): 56. http://dx.doi.org/10.3390/photonics6020056.

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We explore the propagation of the cylindrical vector beams (CVB) in turbid tissue-like scattering medium in comparison with the conventional Gaussian laser beam. The study of propagation of CVB and Gaussian laser beams in the medium is performed utilizing the unified electric field Monte Carlo model. The implemented Monte Carlo model is a part of a generalized on-line computational tool and utilizes parallel computing, executed on the NVIDIA Graphics Processing Units (GPUs) supporting Compute Unified Device Architecture (CUDA). Using extensive computational studies, we demonstrate that after p

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36

SINGH, ARVINDER, and NAVPREET SINGH. "Guiding of a laser beam in collisional magnetoplasma channel." Journal of Plasma Physics 78, no. 3 (2012): 249–57. http://dx.doi.org/10.1017/s0022377812000049.

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AbstractLaser guiding through an axially non-uniform collisional magnetoplasma channel formed by ionizing laser prepulse has been investigated. Self-defocusing of the ionizing prepulse leads to an axial non-uniform plasma channel. Due to the propagation of second laser beam through such preformed plasma channel, non-uniform heating of electrons takes place on account of non-uniform intensity distribution of laser beam. Non-uniform heating diffuses the electrons away from the axis and thereby enhances the plasma channel. Due to the competition between diffraction and refraction phenomenon throu

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37

Fahey, Thomas, Maidul Islam, Alessandro Gardi, and Roberto Sabatini. "Laser Beam Atmospheric Propagation Modelling for Aerospace LIDAR Applications." Atmosphere 12, no. 7 (2021): 918. http://dx.doi.org/10.3390/atmos12070918.

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Atmospheric effects have a significant impact on the performance of airborne and space laser systems. Traditional models used to predict propagation effects rely heavily on simplified assumptions of the atmospheric properties and their interactions with laser systems. In the engineering domain, these models need to be continually improved in order to develop tools that can predict laser beam propagation with high accuracy and for a wide range of practical applications such as LIDAR (light detection and ranging), free-space optical communications, remote sensing, etc. The underlying causes of l

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38

Gorbunov, Michael E., Oksana A. Koval, Victor A. Kulikov, and Alexey E. Mamontov. "Method of spherical phase screens for the modeling of propagation of diverging beams in inhomogeneous media." ITM Web of Conferences 30 (2019): 15027. http://dx.doi.org/10.1051/itmconf/20193015027.

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The phase-screen (split-step) method is widely used for the modeling of wave propagation in inhomogeneous media. Most known is the method of flat phase screens. An optimized approach based on cylindrical phase screen was introduced for the 2-D modeling of radio occultation sounding of the Earth’s atmosphere. In this paper, we propose a further generalization of this method for the 3-D problem of propagation of diverging beams. Our generalization is based on spherical phase screens. In the paraxial approximation, we derive the formula for the vacuum screen- to-screen propagator. We also derive

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TOCI, GUIDO, MATTEO VANNINI, and RENZO SALIMBENI. "Effects of second-order nonstationary cascaded processes on Gaussian beam propagation." Laser and Particle Beams 17, no. 1 (1999): 119–28. http://dx.doi.org/10.1017/s026303469917109x.

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This work proposes an analytical perturbative method describing the effects on the propagation of finite aperture beams due to the self-phase and self-amplitude modulation which result from cascaded second order interaction of ultrashort light pulses. The method merges the semi-analytical solution with a perturbative beam propagation technique, namely the Gaussian Beam Decomposition, which describes the effects of the non linear modulation on the free beam propagation. In particular we have studied the problem of the time- and intensity-dependent transmission of the pulse through slits or aper

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40

Singh, Arvinder, and Naveen Gupta. "Electron plasma wave excitation by beating of two q-Gaussian laser beams in collisionless plasma." Laser and Particle Beams 34, no. 2 (2016): 230–41. http://dx.doi.org/10.1017/s026303461500097x.

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AbstractThis paper presents a scheme for excitation of an electron-plasma wave (EPW) by beating two q-Gaussian laser beams in an underdense plasma where ponderomotive nonlinearity is operative. Starting from nonlinear Schrödinger-type wave equation in Wentzel–Kramers–Brillouin (WKB) approximation, the coupled differential equations governing the evolution of spot size of laser beams with distance of propagation have been derived. The ponderomotive nonlinearity depends not only on the intensity of first laser beam, but also on that of second laser beam. Therefore, the dynamics of one laser beam

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41

Balakin, A. A., S. A. Skobelev, A. V. Andrianov, E. A. Anashkina, and A. G. Litvak. "COHERENT PROPAGATION OF LASER BEAMS IN MCF FIBERS." XXII workshop of the Council of nonlinear dynamics of the Russian Academy of Sciences 47, no. 1 (2019): 21–23. http://dx.doi.org/10.29006/1564-2291.jor-2019.47(1).5.

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The successful development of fiber-optic technologies in recent decades has stimulated research on the replacement of components of solid-state laser systems with fiber components, which can drastically change the attractiveness of the corresponding applied developments. Yielding on the energy characteristics of solid-state systems, fiber lasers and nonlinear optical devices have high efficiency of conversion of pump energy to radiation energy associated with waveguide geometry, high quality of the spatial profile of the laser beam, as well as low cost, compactness, lack of alignment in work

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42

Misra, Shikha, Sanjay K. Mishra, and P. Brijesh. "Coaxial propagation of Laguerre–Gaussian (LG) and Gaussian beams in a plasma." Laser and Particle Beams 33, no. 1 (2015): 123–33. http://dx.doi.org/10.1017/s0263034615000142.

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AbstractThis paper investigates the non-linear coaxial (or coupled mode) propagation of Laguerre–Gaussian (LG) (in particular L01 mode) and Gaussian electromagnetic (em) beams in a homogeneous plasma characterized by ponderomotive and relativistic non-linearities. The formulation is based on numerical solution of non-linear Schrödinger wave equation under Jeffreys–Wentzel–Kramers–Brillouin approximation, followed by paraxial approach applicable in the vicinity of intensity maximum of the beams. A set of coupled differential equations for spot size (beam width) and phase evolution with space co

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43

Dhareshwar, L. J., P. A. Naik, T. C. Kaushik, and H. C. Pant. "Study of laser-driven shock wave propagation in Plexiglas targets." Laser and Particle Beams 10, no. 1 (1992): 201–11. http://dx.doi.org/10.1017/s0263034600004328.

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An experimental study of laser-driven shock wave propagation in a transparent material such as Plexiglas using a high-speed optical shadowgraphy technique is presented in this paper. A Nd:glass laser was used to produce laser intensity in the range 1012-1014 W/cm2 on the target. Optical shadowgrams of the propagating shock front were recorded with a second-harmonic (0.53-μm) optical probe beam. Shock pressures were measured at various laser intensities, and the scaling was found to agree with the theoretically predicted value. Shock pressure values have also been obtained from a one-dimensiona

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44

Singh, Arvinder, and Navpreet Singh. "Optical guiding of a laser beam in an axially nonuniform plasma channel." Laser and Particle Beams 28, no. 2 (2010): 263–68. http://dx.doi.org/10.1017/s0263034610000133.

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AbstractThe guiding of a laser beam in a plasma channel formed by a short laser prepulse is investigated. Due to the self defocusing of an ionizing short laser prepulse, the plasma channel formed is axially nonuniform. When a delayed second laser beam is allowed to propagate through such a preformed plasma channel, convergence and divergence of the beam is observed due to the relative competition of the refraction and diffraction phenomenon. We have solved the wave equation governing the propagation characteristics of an ionizing prepulse and a delayed pulse by the moment theory approach. Resu

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Saydi, J., A. Lotfalian, M. Abedi, J. Khalilzadeh, and H. Saghafifar. "Atmospheric Error Correction of the Laser Beam Ranging." Advances in Meteorology 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/294741.

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Atmospheric models based on surface measurements of pressure, temperature, and relative humidity have been used to increase the laser ranging accuracy by ray tracing. Atmospheric refraction can cause significant errors in laser ranging systems. Through the present research, the atmospheric effects on the laser beam were investigated by using the principles of laser ranging. Atmospheric correction was calculated for 0.532, 1.3, and 10.6 micron wavelengths through the weather conditions of Tehran, Isfahan, and Bushehr in Iran since March 2012 to March 2013. Through the present research the atmos

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Guan, Bing, Haiyang Yu, Wei Song, and Jaeho Choi. "Wave Structure Function and Long-Exposure MTF for Gaussian-Beam Waves Propagating in Anisotropic Maritime Atmospheric Turbulence." Applied Sciences 10, no. 16 (2020): 5484. http://dx.doi.org/10.3390/app10165484.

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The expressions of wave structure function (WSF) and long-exposure modulation transfer function (MTF) for laser beam propagation through non-Kolmogorov turbulence were derived in our previous work. In this paper, based on anisotropic maritime atmospheric non-Kolmogorov spectrum, the new analytic expression of WSF for Gaussian-beam waves propagation through turbulent atmosphere in a horizontal path is derived. Moreover, using this newly derived expression, long-exposure MTF for Gaussian-beam waves is obtained for analyzing the degrading effects in an imaging system. Using the new expressions, W

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Davies, S. C., and James R. Brock. "Laser beam propagation in an evaporating polydisperse aerosol." Applied Optics 26, no. 9 (1987): 1806. http://dx.doi.org/10.1364/ao.26.001806.

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Strohschein, James D., Herb J. J. Seguin, and Clarence E. Capjack. "Beam propagation constants for a radial laser array." Applied Optics 37, no. 6 (1998): 1045. http://dx.doi.org/10.1364/ao.37.001045.

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Tang, Hua, and Hong Guo. "Propagation of intense laser beam in plasma channel." Physics Letters A 321, no. 2 (2004): 111–19. http://dx.doi.org/10.1016/j.physleta.2003.12.017.

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Rosocha, Louis A., John McLeod, and John A. Hanlon. "Beam Propagation Considerations in the Aurora Laser System." Fusion Technology 11, no. 3 (1987): 624–33. http://dx.doi.org/10.13182/fst87-a25039.

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