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Title: Scattering apodizer for laser beams

Abstract

A method is disclosed for apodizing a laser beam to smooth out the production of diffraction peaks due to optical discontinuities in the path of the laser beam, such method comprising introduction of a pattern of scattering elements for reducing the peak intensity in the region of such optical discontinuities, such pattern having smoothly tapering boundaries in which the distribution density of the scattering elements is tapered gradually to produce small gradients in the distribution density, such pattern of scattering elements being effective to reduce and smooth out the diffraction effects which would otherwise be produced. The apodizer pattern may be produced by selectively blasting a surface of a transparent member with fine abrasive particles to produce a multitude of minute pits. In one embodiment, a scattering apodizer pattern is employed to overcome diffraction patterns in a multiple element crystal array for harmonic conversion of a laser beam. The interstices and the supporting grid between the crystal elements are obscured by the gradually tapered apodizer pattern of scattering elements.

Inventors:
; ;
Issue Date:
OSTI Identifier:
5409215
Application Number:
ON: DE84006165
Assignee:
EDB-84-037287
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; LASERS; SCATTERING; CRYSTALS; DIFFRACTION; COHERENT SCATTERING; 420300* - Engineering- Lasers- (-1989)

Citation Formats

Summers, M.A., Hagen, W.F., and Boyd, R.D. Scattering apodizer for laser beams. United States: N. p., 1984. Web.
Summers, M.A., Hagen, W.F., & Boyd, R.D. Scattering apodizer for laser beams. United States.
Summers, M.A., Hagen, W.F., and Boyd, R.D. Sun . "Scattering apodizer for laser beams". United States.
@article{osti_5409215,
title = {Scattering apodizer for laser beams},
author = {Summers, M.A. and Hagen, W.F. and Boyd, R.D.},
abstractNote = {A method is disclosed for apodizing a laser beam to smooth out the production of diffraction peaks due to optical discontinuities in the path of the laser beam, such method comprising introduction of a pattern of scattering elements for reducing the peak intensity in the region of such optical discontinuities, such pattern having smoothly tapering boundaries in which the distribution density of the scattering elements is tapered gradually to produce small gradients in the distribution density, such pattern of scattering elements being effective to reduce and smooth out the diffraction effects which would otherwise be produced. The apodizer pattern may be produced by selectively blasting a surface of a transparent member with fine abrasive particles to produce a multitude of minute pits. In one embodiment, a scattering apodizer pattern is employed to overcome diffraction patterns in a multiple element crystal array for harmonic conversion of a laser beam. The interstices and the supporting grid between the crystal elements are obscured by the gradually tapered apodizer pattern of scattering elements.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}