APhotorefractive properties of liquid crystal hybrid thin film based on side polished fiber sensor

Using the property of side polished fiber (SPF) sensor's polishing area sensitive to external refractive index, the photorefractive effect of liquid crystal hybrid film mixed with Azobenzene (AZO) and ZLI811 was studied under UV light pumping. The mixture composed of liquid crystal, AZO, and ZLI811 was coated on the polishing area after the SPF was calibrated, and the hybrid film was prepared. The transmission optical power in the SPF changes when photosensitive film is UV irradiated. Experiment shows that the photosensitive film is a negative photorefractive material, and the refractive index changes from 1.474 to 1.470 under the UV light pumping. This photosensitive film material can be used to create a new all-fiber optical-controllable components and sensors.