Disclosed herein are second order nonlinear optic polyimide polymers
comprising repeating units represented by the formula: ##STR00001##
wherein each of the substituents is given the definition as set forth in
the Specification and Claims.Also disclosed are the preparation processes
of these polymers, chromophore-forming compounds for synthesis of these
polymers, and the intermediate polymers thereof. The second order
nonlinear optic polyimide polymers of formula (I) may be used in the
manufacture of electro-optic (EO) devices, such as electro-optic
waveguide devices.