A Study of TPF Structure for Multiple Overlapping of Picosecond Laser Light Pulses.

Abstract

A systematic study has been conducted to characterize the multiple overlapping of closely spaced laser pulses in a two-photon fluorescence (TPF) cell. Parametric analysis of the autocorrelation function for the amplitude of a closely spaced laser pulse train containing n-pulses has reproduced TPF spectra experimentally observed with a low-light-level electro-optics detecting system. The effects of one- and two-photon absorption has been analyzed. Theoretical predictions have been presented for peak to background ratios, number and spacings of TPF peaks, relative TPF peak intensities and fluorescent decay spectra. A design of an experimental system for generating closely spaced laser pulses has been presented. Closed form solutions have been obtained for cases in which two-photon absorption is negligible. Finally, it can be concluded that laser pulses separated by distances on the order of one picosecond can be characterized with this system. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1980
Accession Number
ADA081939

Entities

People

  • D. D. Venable

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Amplitude
  • Electro-Optics
  • Intensity
  • Laser Pulses
  • Light Pulses
  • Low Light Levels
  • Measurement
  • Optics
  • Parametric Analysis
  • Photons
  • Physics
  • Plastic Explosives
  • Spectra
  • Two Dimensional
  • Two Photon Absorption

Fields of Study

  • Physics

Readers

  • Approximation Theory.
  • Pulsed Power and Plasma Physics.
  • Spectroscopy.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers
  • Space
  • Space - Hall-Effect Thruster
  • Space - Space Objects