Design and Testing of a Refractive Laser Beam Homogenizer

reportActive / Technical Report | Accession Number: ADA146997 | Open PDF

Abstract:

A survey is made of various techniques to create a homogeneous or flat top laser beam profile. A refractive homogenizer was designed for use with a NDYAG laser with output at its fundamental 1.06 micrometer and frequency doubled 532 nm modes. The system consists of a 2X beam expander and two faceted cylindrical lenses with differing focal lengths. Each cylindrical lens focusses its input into a strip the width of a facet. By orienting their axes at a 90 degree angle and focussing them on the same plane, the beam is concentrated into a square focus. Formulae for calculating the facet angles are derived and a FORTRAN computer square focus. Formulae for calculating the facet angles are derived and a FORTRAN computer program was written to calculate them with a precision greater than one is able to fabricate them.

Author(s):
Fernelius, Nils C. ; Bradley, Kenneth R. ; Hoekstra, Brian L.
Author Organization(s):
AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH
Descriptive Note:
Final interim rept. Nov 82-Feb 84
Pagination:
0043

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFWAL-TR-84-4042
Task Number(s):
Q1
Project Number(s):
2306
Monitor Series:
AFWAL
 Subject Terms
Joint Capability Areas:
JCA_1.2.7_Experimentation; JCA_5_Command and Control; JCA_5.3_Planning
Modernization Areas:
Microelectronics; Directed Energy
Communities of Interest:
Air Platforms
Descriptor(s):
*COMPUTER PROGRAMS, *LASER BEAMS, *INFRARED LASERS, *LENSES, YAG LASERS, COMPUTERS, LASERS, FORTRAN, CYLINDRICAL BODIES, LENGTH, FOCUSING, REFRACTION, OPTICAL COATINGS, DIGITAL COMPUTERS, NEODYMIUM LASERS, HARMONIC GENERATORS
Field(s)/Group(s):
Computer Programming and Software, Computer Hardware, Optics
Keyword(s):
BEAM HOMOGENIZERS, FACETED LENSES, FLAT TOP PROFILES, REFRACTIVE HOMOGENIZERS, UNIFORM BEAMS, PE61102F, WUAFWAL2306Q106
Report Date:
1984 Sep 01