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Showing 1 to 8 of 8 for “"Laser beam propagation"”.
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Coherent and partially coherent CW laser beam propagation in lens-like media: a diffractive ray-theoretic approach
… and stochastic effects associated with the propagation of beamed signals, is illustrated in this thesis by considering the propagation of coherent and partially coherent cw Gaussian laser beams in lens-like media (e.g., selfoc fibers, laser induced plasmas, etc.). The main results presented …
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Optical resistance of dielectric coatings to multi-pulse femtosecond laser radiation /
… and theoretical analysis of the femtosecond laser pulse induced damage processes in thin film dielectric coatings. Experimental investigations were performed by automated metrological facility designed for S-on-1 laser-induced damage threshold measurements. Femtosecond repetitive pulses (1 …
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Predicting the Spatial Output Field of a Laser Beam in a Thermally Self-Induced Inhomogeneous Medium
Laser beam propagation in a thermally self-induced inhomogeneous medium is investigated to find the transient spatial output field for an arbitrary incident field. The paraxial wave equation is coupled with the heat diffusion equation to predict the beam output field as the index of refraction …
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Influence of Induced natural convection on laser propagation : analysis and interferometric visualization
… of a self-induced natural convection flow on the propagation of a high energy laser beam. The two configurations considered are of a vertical laser beam (propagation direction opposite to gravity) and a horizontal laser beam (gravity acting in a direction perpendicular to propagation) traveling …
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Novel smart modules for imaging, communications, and displays
… (DMD). The proposed modules include imagers for laser characterization and general purpose imaging which smartly adapt to changes in irradiance, optical wireless communication systems which can adapt to the number of users and to changes in link length, and a smart laser projection display that …
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Didelės energijos keturių lėkių Nd:YAG stiprintuvas su SBS impulso spūda interferenciniam struktūravimui /
… high speed, precision and simplicity, lasers are often used in surface structuring. Direct Laser Interference Patterning (DLIP), is a laser-based technology that uses the physical principle of interference of high-intensity coherent laser beams, as well as laser ablation, to create …
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Fade Statistics For A Lasercom System And The Joint Pdf Of A Gamma-gamma Distributed Irradiance And Its Time Derivative
The performance of lasercom systems operating in the atmosphere is reduced by optical turbulence, which causes irradiance fluctuations in the received signal. The result is a randomly fading signal. Fade statistics for lasercom systems are determined from the probability density function (PDF) of …