Results 301 to 310 of about 263,292 (331)
Laser Beam Transformation [PDF]
, 1982 Before it is put to use, a laser beam is generally transformed in some way. The most common type of transformation is that which occurs when the beam is made to propagate in free space or through a suitable optical system. Since this produces a change in the spatial distribution of the beam (e.g., the beam may be focused or expanded), we shall refer to
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Scientific American, 2009
The article discusses the discovery that pulsed, high-intensity, slightly bent laser beams can cause curved plasma trails. The ability for scientists to use the self-bending beam to study the structure of laser pulses is noted, mentioning that scientists accomplish the effect by shooting multiple one-centimeter-wide, 35-femtosecond pulses through a ...
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The article discusses the discovery that pulsed, high-intensity, slightly bent laser beams can cause curved plasma trails. The ability for scientists to use the self-bending beam to study the structure of laser pulses is noted, mentioning that scientists accomplish the effect by shooting multiple one-centimeter-wide, 35-femtosecond pulses through a ...
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Laser Spectroscopy in Molecular Beams
1979For many years molecular beams were mainly employed for scattering experiments. The combination of new spectroscopic methods with molecular beam techniques has brought about a wealth of new information on the structure of atoms and molecules, on details of collision processes, and on fundamentals of quantum optics and the interaction of light with ...
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Optical and Quantum Electronics, 1995
The fundamentals of the manufacturing process of laser beam cutting are discussed. The equipment necessary for working on two- and three-dimensional applications is described. Criteria for characterizing cutting quality and cutting applications with different laser types are presented.
J. Hutfless +3 more
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The fundamentals of the manufacturing process of laser beam cutting are discussed. The equipment necessary for working on two- and three-dimensional applications is described. Criteria for characterizing cutting quality and cutting applications with different laser types are presented.
J. Hutfless +3 more
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1989
Abstract Laser beam machining removes, melts, or thermally modifies a material by focusing a coherent beam of monochromatic light on the workpiece. This article describes the principal lasers used in metal processing: neodymium-glass, carbon dioxide, and neodymium-doped yttrium aluminum garnet lasers.
Gene White, Dana Elza
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Abstract Laser beam machining removes, melts, or thermally modifies a material by focusing a coherent beam of monochromatic light on the workpiece. This article describes the principal lasers used in metal processing: neodymium-glass, carbon dioxide, and neodymium-doped yttrium aluminum garnet lasers.
Gene White, Dana Elza
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1980
It is often necessary to characterize the beam emitted from a laser to define potential exposure conditions. The beam’s characteristics may be required near the output of the laser, at some considerable distance from the laser after it has been collimated or focused, or simply at some distance after the beam has left the laser cavity as a “ray beam ...
Myron L. Wolbarsht, David H. Sliney
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It is often necessary to characterize the beam emitted from a laser to define potential exposure conditions. The beam’s characteristics may be required near the output of the laser, at some considerable distance from the laser after it has been collimated or focused, or simply at some distance after the beam has left the laser cavity as a “ray beam ...
Myron L. Wolbarsht, David H. Sliney
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Laser beams with phase singularities
Optical and Quantum Electronics, 1992Phase singularities in an optical field appear as isolated dark spots and can be generated in active laser cavities or by computer generated holograms. Detection and categorization of these singularities can easily be achieved either by interferometry or Fourier transform pattern recognition using a computer generated hologram.
Heckenberg, N. R. +4 more
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2009
A stimulated emission of radiation is possible only in media where a population inversion occurs. The change of a particle energy from a higher-energy state to a lower-energy state is a result of an electron moving to a lower orbital. The laser phenomenon is interesting due to the specific light it emits. It is a well focused monochromatic beam, it has
J. Kacerka +2 more
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A stimulated emission of radiation is possible only in media where a population inversion occurs. The change of a particle energy from a higher-energy state to a lower-energy state is a result of an electron moving to a lower orbital. The laser phenomenon is interesting due to the specific light it emits. It is a well focused monochromatic beam, it has
J. Kacerka +2 more
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SPIE Proceedings, 2001
In recent papers we presented a wave model for closed conservative bounded systems, whose behavior is described by the Schrodinger equation. For such a system, the Schrodinger equation is equivalent to the wave equation. The analysis of the wave properties reveals an intrinsic coherence of the electron motions.
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In recent papers we presented a wave model for closed conservative bounded systems, whose behavior is described by the Schrodinger equation. For such a system, the Schrodinger equation is equivalent to the wave equation. The analysis of the wave properties reveals an intrinsic coherence of the electron motions.
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Nature Photonics, 2007
Knowledge of a laser beam's shape and output-power distribution is critical for optimizing laser performance. Neil Savage summarizes the latest beam-profiling products on the market.
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Knowledge of a laser beam's shape and output-power distribution is critical for optimizing laser performance. Neil Savage summarizes the latest beam-profiling products on the market.
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