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Title: Gaussian beam profile shaping apparatus, method therefore 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. 27 figs.

Inventors:
; ;
Issue Date:
Research Org.:
Sandia Corporation
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
321299
Patent Number(s):
5,864,430
Application Number:
PAN: 8-711,783; TRN: 99:003333
Assignee:
Sandia Corp., Albuquerque, NM (United States)
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 26 Jan 1999
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM OPTICS; BEAM PROFILES; BEAM SHAPING; LENSES; OPTICAL SYSTEMS; FOURIER TRANSFORMATION

Citation Formats

Dickey, F M, Holswade, S C, and Romero, L A. Gaussian beam profile shaping apparatus, method therefore and evaluation thereof. United States: N. p., 1999. Web.
Dickey, F M, Holswade, S C, & Romero, L A. Gaussian beam profile shaping apparatus, method therefore and evaluation thereof. United States.
Dickey, F M, Holswade, S C, and Romero, L A. Tue . "Gaussian beam profile shaping apparatus, method therefore and evaluation thereof". United States.
@article{osti_321299,
title = {Gaussian beam profile shaping apparatus, method therefore and evaluation thereof},
author = {Dickey, F M and Holswade, S C and Romero, L 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. 27 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}