An Imaging Method for Non Linear Medium Characteristic Measurements,

Abstract

A non linear medium is placed in the focal plane of a 4f set up. The Fourier spectrum S(u) induces phase and amplitude changes inside the material. Such self induced non linear effects produce two modifications in the image I(x): (1) intensity variation due to non linear absorption, (2) shape changes due to non linear refractive index variation. The study of these modifications allows the measurement of the non linear material characteristics. This method is used to study photorefractive materials excited either with CW or with pulsed laser.

Document Details

Document Type
Technical Report
Publication Date
May 22, 1992
Accession Number
ADP006729

Entities

People

  • G. Bouders
  • G. Rivoire
  • J. P. Lecoq
  • M. Sylla
  • X. Nguyen Phu

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Absorption
  • Advanced Materials
  • Amplitude
  • Engineered Materials
  • Focal Planes
  • Intensity
  • Lasers
  • Massachusetts
  • Materials
  • Measurement
  • Photorefractive Materials
  • Plasmonic Materials
  • Pulsed Lasers
  • Refractive Index
  • Spectra

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers