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Title: Method and apparatus for reducing coherence of high-power laser beams

Abstract

Method and apparatus for reducing the coherence and for smoothing the power density profile of a collimated high-power laser beam in which the beam is focused at a point on the surface of a target fabricated of material having a low atomic number. The initial portion of the focused beam heats the material to form a hot reflective plasma at the material surface. The remaining, major portion of the focused beam is reflected by the plasma and recollected to form a collimated beam having reduced beam coherence.

Inventors:
 [1];  [1]
  1. Ann Arbor, MI
Issue Date:
OSTI Identifier:
863189
Patent Number(s):
4116542
Assignee:
KMS Fusion, Inc. (Ann Arbor, MI)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
DOE Contract Number:  
E(11-1)-2709
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; reducing; coherence; high-power; laser; beams; smoothing; power; density; profile; collimated; beam; focused; surface; target; fabricated; material; atomic; initial; portion; heats; form; hot; reflective; plasma; remaining; major; reflected; recollected; reduced; high-power laser; density profile; laser beams; laser beam; material surface; power laser; major portion; power density; collimated beam; focused beam; /359/219/376/

Citation Formats

Moncur, Norman K, and Mayer, Frederick J. Method and apparatus for reducing coherence of high-power laser beams. United States: N. p., 1978. Web.
Moncur, Norman K, & Mayer, Frederick J. Method and apparatus for reducing coherence of high-power laser beams. United States.
Moncur, Norman K, and Mayer, Frederick J. Sun . "Method and apparatus for reducing coherence of high-power laser beams". United States. https://www.osti.gov/servlets/purl/863189.
@article{osti_863189,
title = {Method and apparatus for reducing coherence of high-power laser beams},
author = {Moncur, Norman K and Mayer, Frederick J},
abstractNote = {Method and apparatus for reducing the coherence and for smoothing the power density profile of a collimated high-power laser beam in which the beam is focused at a point on the surface of a target fabricated of material having a low atomic number. The initial portion of the focused beam heats the material to form a hot reflective plasma at the material surface. The remaining, major portion of the focused beam is reflected by the plasma and recollected to form a collimated beam having reduced beam coherence.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

Patent:

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