Polymer Waveguide Transmission Loss And Electro-optic Coefficient Measurements

Integrated Optical Wave-Guide device is one of the most important basic components in Optical Communication System. In the last few years, Polymer, as a new type material of manufacturing the Wave-Guide device, has been becoming the focus of scientific research because of its advantages on easy integration, quick response, high electro-optical (EO) nonlinear coefficient, low cost and so on. During the research of Polymer Thin Films materials, establishing a research means of Macro-scopical performance and obtaining the accurate data of the parameters (Electro-optical Coefficient, Refractive Index, Attenuation Propagation and so on) can provide reliable foundation for Wave-Guide device. Therefore, this article is attempting to carry out a quick, accurate and lossless measurement on the parameters (Attenuation Propagation, Electro-optical Coefficient and so on) of Polymer Wave-Guide.This thesis introduces the development of Organic Polymer Photoelectric Devices, analyzes and contrasts the general methods used in oversea countries to measure Wave-Guide's Attenuation Propagation and Electro-optical Coefficient. Then the preparation and polarization of Electro optical Polymer Planar Wave-Guide is investigated , analyze and discuss material choice and problem met in the experiment and fabricates Planar Polarized Polymer Wave-Guide. Finally, combined with the Prism Coupling technique, the Numeric Analyzing technique is adopted to work out Refractive Index of Wave-Guide core layer.During the measurement of Attenuation Propagation, in allusion to the shortage of traditional Prism Coupling technique in operation ability and measurement precision, the incorporating photo-electricity measuring system of Wave-Guide attenuation propagation is designed based on a refined measurement method - Liquid Coupling, presented by Cha-Chi-Teng. This method uses the liquid which has the higher refractive index than the thin film instead of the prism to couple the light out the waveguide. Through changing the depth of the waveguide in the liquid, in the end the intensity of propagation line of waveguide is obtained. Using the He-Ne laser as the optical source, the measurement system, which is adopting twin optical path, eliminates the error caused by the non-stability of optical intensity. In order to collect the 2-way optical signals continuously and synchronously, the high-precision data collecting system is designed by using TLC2543 chip. Besides, in order to have a real-time measuring and portray the attenuation curve, the PC serial communication program is developed by using MatLab. The results of the experiment indicate, the whole design of the system is logical with reliable performance and the expected results are met.Electro-optical Coefficient (after polarizing Photoelectric Polymer) is an important parameter of Polymer Wave-Guide. This thesis analyzes the electro-optical effect of Electro optical Polymer in detail, provides a whole theoretical processing result for Polymer Macro-scopical Linear Electro-optical Coefficient measured by Simple-Reflection technique and designs a device to measure Electro-optical Coefficient of Polymer Thin Films. This creates the conditions for further research on Organic Polymer in the future.