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:
-
- 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):
-
B - PERFORMING OPERATIONS B23 - MACHINE TOOLS B23K - SOLDERING OR UNSOLDERING
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- 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 = {Fri Jan 01 00:00:00 EST 1999},
month = {Fri Jan 01 00:00:00 EST 1999}
}
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