skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Gaussian beam profile shaping apparatus, method therefor and evaluation thereof

Abstract

A method and apparatus maps a Gaussian beam into a beam with a uniform irradiance profile by exploiting the Fourier transform properties of lenses. A phase element imparts a design phase onto an input beam and the output optical field from a lens is then the Fourier transform of the input beam and the phase function from the phase element. The phase element is selected in accordance with a dimensionless parameter which is dependent upon the radius of the incoming beam, the desired spot shape, the focal length of the lens and the wavelength of the input beam. This dimensionless parameter can also be used to evaluate the quality of a system. In order to control the radius of the incoming beam, optics such as a telescope can be employed. The size of the target spot and the focal length can be altered by exchanging the transform lens, but the dimensionless parameter will remain the same. The quality of the system, and hence the value of the dimensionless parameter, can be altered by exchanging the phase element. The dimensionless parameter provides design guidance, system evaluation, and indication as to how to improve a given system.

Inventors:
 [1];  [1];  [1]
  1. Albuquerque, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
872120
Patent Number(s):
5864430
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
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:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
gaussian; beam; profile; shaping; apparatus; method; evaluation; maps; uniform; irradiance; exploiting; fourier; transform; properties; lenses; phase; element; imparts; design; input; output; optical; field; lens; function; selected; accordance; dimensionless; parameter; dependent; radius; incoming; desired; spot; shape; focal; length; wavelength; evaluate; quality; control; optics; telescope; employed; size; target; altered; exchanging; remain; hence; value; provides; guidance; indication; improve; phase element; input beam; focal length; fourier transform; beam profile; output optical; gaussian beam; transform lens; /359/219/372/

Citation Formats

Dickey, Fred M, Holswade, Scott C, and Romero, Louis A. Gaussian beam profile shaping apparatus, method therefor and evaluation thereof. United States: N. p., 1999. Web.
Dickey, Fred M, Holswade, Scott C, & Romero, Louis A. Gaussian beam profile shaping apparatus, method therefor and evaluation thereof. United States.
Dickey, Fred M, Holswade, Scott C, and Romero, Louis A. Fri . "Gaussian beam profile shaping apparatus, method therefor and evaluation thereof". United States. https://www.osti.gov/servlets/purl/872120.
@article{osti_872120,
title = {Gaussian beam profile shaping apparatus, method therefor and evaluation thereof},
author = {Dickey, Fred M and Holswade, Scott C and Romero, Louis A},
abstractNote = {A method and apparatus maps a Gaussian beam into a beam with a uniform irradiance profile by exploiting the Fourier transform properties of lenses. A phase element imparts a design phase onto an input beam and the output optical field from a lens is then the Fourier transform of the input beam and the phase function from the phase element. The phase element is selected in accordance with a dimensionless parameter which is dependent upon the radius of the incoming beam, the desired spot shape, the focal length of the lens and the wavelength of the input beam. This dimensionless parameter can also be used to evaluate the quality of a system. In order to control the radius of the incoming beam, optics such as a telescope can be employed. The size of the target spot and the focal length can be altered by exchanging the transform lens, but the dimensionless parameter will remain the same. The quality of the system, and hence the value of the dimensionless parameter, can be altered by exchanging the phase element. The dimensionless parameter provides design guidance, system evaluation, and indication as to how to improve a given system.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Patent:

Save / Share:

Works referenced in this record:

Diffractive Optical Elements For Use In Infrared Systems
journal, June 1989


Multifaceted Laser Beam Integrators: General Formulation And Design Concepts
journal, November 1988


Kinoform phase plates for focal plane irradiance profile control
journal, January 1994


Laser beam profile shaping with interlaced binary diffraction gratings
journal, January 1982


Method for converting a Gaussian laser beam into a uniform beam
journal, March 1981


Geometrical transformations in optics*
journal, January 1974


Holographic conversion of a Gaussian beam to a near-field uniform beam
journal, January 1991


Transforming a circular laser beam into a square or trapezoid--almost
journal, January 1992