Modified polyimide side-chain polymers with high glass transition temperatures for nonlinear optical applications

16 December 1993

proceedings article
Published by SPIE-Intl Soc Optical Eng

p. 70-77
https://doi.org/10.1117/12.165243

Abstract

Novel modified polyimide polymers with nonlinear optical chromophores as pendent side groups show high glass transition temperatures and large nonlinear optical coefficients up to d₃₃ equals 78 pm/V at (lambda) equals 1313 nm (electro-optic coefficient r₃₃ equals 18 pm/V). Due to the high glass transition temperatures of up to 190 $DEGC an excellent long term stability of the nonlinearity results. Extrapolation from measurements at elevated temperatures predict long term stabilities of the nonlinearity in excess of tens of years at 80 $DEGC and hundreds to thousands of years at room temperature. The structural (molecular weight, glass transition temperature) and optical (refractive index, nonlinearity) properties of these polyimides can easily be varied which allows to taylor active layer and buffer layer materials.

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