Generation of optical filaments by use of phase plate
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United States of America Patent
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May 23, 2006
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app pub date -
Aug 14, 2003
filing date -
Aug 14, 2003
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Abstract
Optical filaments are formed controllably in a gaseous medium such as air. A phase plate introducing a phase singularity is introduced into the path of the laser beam that forms the optical filaments in the medium. The phase plate is preferably a vortex phase plate having one or more singularities. The locations and characteristics of the phase singularities are selected to control the number and locations of the optical filaments.
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