Patent ID: 7564563
Filing Date: 2009-07-21
Classification: G01C

Abstract:
1. A laser gyro comprising: a Si substrate; laser light excitation means formed on the Si substrate and configured to excite first and second laser lights propagating in clockwise and counterclockwise directions in a circular ring-shaped path; coupling means formed on the Si substrate, said coupling means formed of a SiO a photodetector disposed on the Si substrate and configured to observe an interference signal generated by the superimposed first and second laser lights, wherein the laser light excitation means includes a circular ring-shaped optical waveguide formed of a SiO the coupling means includes an optical coupler configured to extract the first and the second laser lights from the ring-shaped path, and the semiconductor optical amplifier and the photodetector are disposed individually in concave portions, each concave portion being formed by removing the multilayer film partly.