An Investigation of the Principles and Techniques of Bragg Diffraction Laser Beam Probing of an Ultrasonic Field

Abstract

Probing of the near field of an ultrasonic beam in water with a thin laser beam has verified that a diffracted beam of light, whose amplitude is a function of the angle of incident light, is related to the spatial Fourier spectrum of the far-field acoustic distribution. There are indications that this method of probing may be useful in evaluating transducer mountings. As an application of the technique, reflection-transmission properties of sound on a liquid-liquid interface are examined, and the detection of evanescent waves verifies their physical existence and properties.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1972
Accession Number
AD0756521

Entities

People

  • Robert D. Brown Jr.

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustics
  • Angle Of Incidence
  • Bragg Angle
  • Detection
  • Diffraction
  • Doppler Effect
  • Evanescent Waves
  • Frequency
  • Geometry
  • Laser Beams
  • Plane Waves
  • Reflection
  • Refractive Index
  • Standards
  • United States Naval Academy
  • Waves

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy