Results 271 to 280 of about 62,100 (308)
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Intensity Profiling The Ultraviolet Laser Beam
SPIE Proceedings, 1989Many applications of ultraviolet (UV) lasers would be greatly facilitated if the designers and users of associated optical systems could characterize the beams as to location, size, shape and intensity distribution at selected points along the optical path.
Paul R. Yoder, Jr. +3 more
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Electronic laser beam profile measurement
SPIE Proceedings, 1998Because the spatial beam structure is the most critical element of a laser, measurement of this beam structure is indispensable in laser design, development, and manufacture. Since measurement of the beam structure inside the cavity is impractical, if not impossible, the beam profile structure outside the laser provides the only real insight into ...
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Gaussian laser beam profile shaping
Optical Engineering, 1996A method for converting single-mode Gaussian beams into beams with uniform irradiance profiles is described. The design is based on a Fourier transform relation between the input and output beam functions. The efficacy of the solution is shown to depend on a parameter that contains the product of the widths of the input and output beams.
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Spatial evolution of laser beam profiles in an SBS amplifier
Applied Optics, 1989We have performed an experimental and theoretical analysis of the modification of the transverse structure of a probe beam on propagation through an SBS amplifier. The theoretical analysis is based on performing a mode decomposition of the incident fields and determining how each mode amplitude is modified as a result of the nonlinear coupling. For the
E J, Miller, M D, Skeldon, R W, Boyd
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Laser beam profile measurement by photothermal deflection technique
Applied Optics, 1986Laser beam profiles are measured using the photothermal deflection technique in an absorbing gas. The method is based on the change of the index of refraction due to laser-radiation heating. (AIP)
A, Rose, Y X, Nie, R, Gupta
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Influence of Laser Beam Profiles on the Performance of Laser‐Driven Flyers
Propellants, Explosives, Pyrotechnics, 2020AbstractIn order to reveal the influence of laser beam profiles on the performance of laser‐driven flyers, three different laser beam profiles including original laser beam, reshaped laser beam and optical fiber output laser beam were used to launch the flyer plates. The original laser beam showed plenty of “hot spots”.
Liang Wang +7 more
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Transformation of a laser beam intensity profile by a deformable mirror
Optics Letters, 1996We developed a deformable mirror with nine actuators for transformation of a laser beam intensity profile. A circular-cross-section Gaussian beam was successfully transformed into a rectangular-cross-section beam by the deformable mirror with conservation of spatial coherency.
K, Nemoto +4 more
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Laser beam profiling the automated way
ICALEO '90: Proceedings of the Laser Materials Processing Conference, 1990With the number of laser systems increasing rapidly in a growing variety of applications, automated quantitative measurements of laser beam parameters has become increasingly important. These methods must address the need for improved consistency, cost-effectiveness, quality, throughput and productivity of laser systems and their use.
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Laser beam profiles in SF6: direct evidence for beam distortion
Chemical Physics Letters, 1981Abstract High-resolution spatial profile measurements of a CO 2 TEA laser beam propagating through SF 6 /Ar mixtures indicate that IR multiple photon absorption measurements averaged over the entire laser beam spatial distribution can be in error by at least a factor of two, implying that accurate measurements require an optically thin sample.
C.F. Meyer, R.L. Woodin, A. Kaldor
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Laser-beam profiles in liquid : direct evidence for self-focusing of a laser beam in
Journal of Physics D: Applied Physics, 1999Self-focusing of low-power CW He-Ne laser radiation, at the wavelength of , has been observed in liquid using a simple and effective technique. New experimental results supporting the hypothesis that self-focusing of laser radiation occurs in liquids are presented in this paper.
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