Interest in nonlinear optical (NLO) organic materials has grown tremendously in recent years, primarily because of the telecommunication industry's need for high-bandwidth optical switching and processing devices to serve information and data transmission.1 Recently, a large efforts in chemical research have been aimed at designing and synthesizing novel electrooptical research have been aimed at designing and synthesizing novel electrooptical chromophores with large optical nonlinearities transparency in the near IR.2 However, it is generally recognized that two other performance charcteristics must be achieved in order to ensure the widespread commercial utilization of eletrooptical waveguide modulator technology, Good thermal stability and low optical loss demands that a number of structure-function relationships be defined.3 In this connection, We wish to report bere here our prelimidary results on a prefluorinated polymide system which incorporates three new electrooptical chromophores. These chromophores, based on a nitro group connected with benzothiazole as the acceptor end of donor-π-bridge-acceptor chromophore and a hydroxyl functional amino group as the donor end, have specific chernical stability. With these materials, a novel series of nonlinear optical polyimides can be obtained for optical modulation in waveguide, due to their good solubility, large optical nonlinearity and specific chemical stability.