Coherence Properties of a Pulsed Ruby Laser

Abstract

The coherence properties of a pulsed ruby, multi-mode laser were determined by recording the time-averaged effect of the radiation field on photographic emulsion. The recorded relative intensity distributions were analyzed and compared with a theoretical, single mode prediction. The laser beam was expanded to a one-inch diameter beam. Then, with the aid of a Twyman-Green interferometer, a temporal coherence length of approximately 1.27 centimeters was observed. Also, for an aperture radius of 0.51 millimeters, in conjunction with a modified Youngs experiment, a spatial coherence length of approximately 2.2 millimeters was observed.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1970
Accession Number
AD0874649

Entities

People

  • Thurston C. Holley

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Diffraction
  • Diffractometers
  • Electron Tubes
  • Engineering
  • Flash Lamps
  • Laser Beams
  • Measurement
  • Optics
  • Photographic Emulsions
  • Photographic Film
  • Photography
  • Power Supplies
  • Refraction
  • Refractive Index
  • Ruby Lasers

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy