Patent ID: 7965914
Filing Date: 2011-06-21
Classification: G01N,G02B

Abstract:
1. A method of determining parameters of a critically coupled optical microring resonator, the method comprising: modeling a coupled portion of the microring resonator as a U-shaped waveguide spaced apart from a straight waveguide by a gap, the U-shaped waveguide having a width that is equivalent to a width of a waveguide of the microring resonator and the microring resonator having a radius that is less than about 2 microns; selecting a width of the straight waveguide and a size of the gap to optimize an output coupling ratio between the U-shaped waveguide and the straight waveguide; wherein the selected straight waveguide width and the selected gap size are the determined parameters of the critically coupled optical microring resonator, and wherein a ratio of the selected straight waveguide width to the microring waveguide width is less than about 0.7 and a ratio of the selected gap size to the microring waveguide width is greater than about 0.5.