Narrow Band Laser Speckle Suppression.

Abstract

A method and apparatus for reducing points of zero intensity, i.e. speckle pattern, emerging from a multimode fiber. The apparatus comprises a beam deflector for rotating an input beam in a conical shape around a launch lens for projecting the beam into the fiber. The rotation of the beam further incorporates the use of two tilting mirrors being 90 deg out of phase to ensure a conical rotation. The conical rotation of the beam deflector ensures that the lens aberrations, which are rotationally symmetric, do not play a factor in beam alignment into the fiber aperture.

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Document Details

Document Type
Technical Report
Publication Date
Apr 29, 1997
Accession Number
ADD018507

Entities

People

  • Ishwar Aggarwal
  • John A. Moon
  • Lynda E. Busse

Organizations

  • United States Department of the Navy

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Amplitude
  • Bandwidth
  • Deflectors
  • Electric Fields
  • Electro-Optic Modulators
  • Fibers
  • Frequency
  • Intensity
  • Inventions
  • Laser Beams
  • Lasers
  • Multimode
  • Optical Fibers
  • Optoelectronic Devices
  • Pulsed Lasers
  • Rotation

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Image Processing and Computer Vision.
  • Optical Fiber Sensing and Electromagnetic Propagation.

Technology Areas

  • Directed Energy