Design Of A Ring Resonator For Integrated Optic Gyros And Simulation Of Character Of Er-Doped Waveguides

The optical waveguide ring resonator is the key sensing unit of the resonator integrated-optic gyro. Its finesse determines the measuring accuracy of the gyro. In this dissertation, the affection induced by waveguide loss to the finesse is analyzed, and it is indicated that the waveguide loss is the main element that deteriorates the finesse. Aimed at decreasing the resonator loss and realizing high accuracy integrated-optic gyros, considering existing materials and processing techniques, preliminary investigations on designing the structure of the resonator, choosing the materials and art techniques for the resonator are developed. To realizing high accuracy integrated optic gyros, one of feasible methods is to dope erbium in the resonator and make a half-active ring resonator. So the main work in this dissertation is compiling and debugging the program for solving the field distribution in channel waveguides using three-dimensional finite-difference beam propagation method. Based on this, employing the relation between the complex atomic susceptibility and the population densities of the Er³⁺, and the effect of the complex susceptibility on the field solutions in the waveguide, a program solving the gain character of the erbium-doped waveguides is developed. Calculating on practical problems shows that both the finite-difference beam propagation method and the gain character programs can give reasonable results. Work in this dissertation makes a good foundation for further designing the half-active ring resonators for integrated-optic gyros.