Preparation and Third-Order Optical Nonlinearity of Organic Dye-Doped Glasses

Abstract

Organic dyes of stilbazolium group, such as 4′-dimethylamino-N-methyl-4-stilbazolium iodide (DMSI) and 4′-diethylamino-4-stilbazolium propylsulfate (DESPS) having large third-order nonlinear succeptibility χ⁽³⁾ values, were incorporated into a low melting PbF₂-SnF₂-SnO-P₂O₅ glass system with a conventional melting- and quenching technique. The dyes were mixed with the glass melts around 300°C. From the optical and infrared absorption spectroscopy, it was found that the original structure of each dye was maintained even in the glass. The χ⁽³⁾ of the dye-doped glass was evaluated from third-harmonic generation, and that of the glass containing DESPS was nearly twice as large as that of the base glass.