Basic Studies of Nonlinear Optical Materials for Eye and Sensor Protection
Abstract
We have studied the basic spectroscopy, kinetics and nonlinear optical properties of a set of power limiting materials, which include six metallobenzoporphyrins and ten donor-acceptor azulenic molecules. These compounds are known to have highly polarizable it-electrons, and therefore are expected to have nonlinear coefficients suitable for utilization in optical limiting devices. In order to diagnose the optical limiting properties of the materials, we developed new two-dimensional Z-scan technique. This technique allows us to measure separately real and imaginary parts of the third order nonlinear susceptibility X(3) of the materials, using arbitrarily beam shaped laser pulse and arbitrary sample thickness. In addition, the beam profile evolution anywhere inside the optical limiting material can be extracted accurately using 2D Z-scan technique. We have tested this technique using Gaussian and non-Gaussian special beam distributions, thin and thick samples, and applied it to the molecules studied. Some of the molecules showed high nonlinear absorption and nonlinear refraction at the wavelength of the experiment 527 nm.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 15, 2000
- Accession Number
- ADA378821
Entities
People
- A. S. Dvornikov
- D. A. Oulianov
- I. V. Tomov
- P. M. Tentzepis
- Pengyu Chen
Organizations
- University of California, Irvine