Nonlinear-optical properties of lead–tin fluorophosphate glass containing acridine dyes

Abstract
A new nonlinear-optical material based on lead–tin fluorophosphate glass doped with the organic dyes Acridine Orange and Acridine Yellow has been developed. These materials are saturable absorbers characterized by saturation intensities of ~100 mW cm−2, response times of ~1 msec, and third-order nonlinear susceptibilities of ~0.1 esu. The low melting temperature of the lead–tin fluorophosphate glass permits doping with many organic dyes without causing their decomposition.