Patent ID: 7194177
Filing Date: 2007-03-20
Classification: G02B

Abstract:
1. A method of making a photonic silicon-on-insulator (SOI) device incorporating a silicon-on-insulator waveguide having a waveguide core, comprising: a) designing a high index contrast silicon-on-insulator waveguide with a predetermined cross sectional geometry and dimensions optimized for design criteria other than final birefringence; b) determining the geometrical birefringence of the waveguide designed in step a); c) determining a target amount, which may be zero, of overall birefringence desired in said waveguide; d) determining an amount of stress to be induced in said waveguide core to achieve a stress-induced birefringence such that a combination of said stress-induced birefringence and said geometrical birefringence results in a final birefringence equal to said target amount; e) fabricating said waveguide; and f) inducing within said waveguide the amount of stress determined in step d).