The process of poling decay with time for poled polymer film waveguides was studied

and an integrated optical method to characterize the order parameter and the poled lifetime of the film waveguides was presented in this paper.The side-chain DANS(4-dimethylamino-4’nitro-stlibene)polymer(50% in weight)and the indium tin oxide-(ITO-)coated glass slides were selected as the waveguide material and the substrates

respectively.The cover layer was air.The DANS polymer film waveguides with suitable thick were made by spin coating.Then the films were poled with the corona-poling setup

which had tungsten wire electrode that was parallel to the surface of the waveguide and along the travelling direction of light in the waveguide.The Poling temperature was 130t

the Poling voltage was about 5~7kV

the Poling current was about 2uA

the poling time was 30min and the space between the surface of the waveguide and the electrode was 9mm.Before and after Poling

the anisotropic effective refractive indices were measured using prism coupling technique in the field of integrated optics.The variety of the ordinary and the extraordinary refractive indices before and after poling and their decay with time were derived from the anisotropic mode eigen-equations

and then curves of the ordinary and the extraordinary refractive indices varied with time were obtained.The curve of the order parameter varied with time was presented and fitted with the multiple exponential function using the least square method.It was determined that the poled lifetime is about 1344 days.