Accession Number:

ADA255910

Title:

Optical Limiting

Descriptive Note:

Final rept.

Corporate Author:

UNIVERSITY OF CENTRAL FLORIDA ORLANDO CENTER FOR RESEARCH IN ELECTRO-OPTICS AND LASERS

Personal Author(s):

Report Date:

1992-05-22

Pagination or Media Count:

32.0

Abstract:

We have been performing careful measurements of the nonlinear optical properties of some organic dyes to determine their suitability for use in devices that can protect sensors against damage from high intensity laser radiation. Dyes that show large excited state absorption with small linear absorption are suitable for such devices. We investigated the nonlinearities for pulses from picoseconds to nanoseconds and find that, since the excited state absorption is cumulative, that the dyes can limit well for nanosecond pulses but not for picoseconds. However, when used in tandem with a second passive nonlinear optical material, we find that we can significantly increase the temporal range over which the device limits. In addition, we find that the dynamic range of limiting devices can be substantially increased using two elements without a significant increase in the optical limiting threshold.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE