Methacrylate polymers bearing pendant stilbene chromophore containing 4’-dialkylamino electron donor and 4-hexylsulfonyl electron acceptor has been synthesized. Owing to the introduced flexible alkyl chain to the NLO chromophore terminal group, soluble polymers was obtained up to 64 mol % of chromophore monomer portion in the copolymer. These amorphous polymers exhibited good film-forming abilities, thermal stability, and excellent optical clarity. The electrooptic coefficient (r(33)) as high as 6.4 pm/V were measured at 1.3 mu m by reflection method. These polymers were easily photobleached by irradiation of light at 350 similar to 450 nm wavelength for lateral confinement in channel waveguide.