Silicon opto-electronic integrated circuit for fiber optic gyros or communication

An opto-electronic integrated circuit, comprising:

• substrate means;
• first and second detector regions formed in one and the opposite ends of said substrate means, respectively;
• first and second receiver means formed in the one and the opposite ends of said substrate means, respectively, and coupled to a corresponding one of the first and second detector means;
• a transparent layer disposed on the substrate means so as to overlay the first and second detector regions and the first and second receiver circuit means;
• first and second waveguide means formed in said layer;
• first fiber attachment means formed in the one end of the substrate means and second fiber attachment means formed in the opposite end of said substrate means;
• and
• said first and second waveguide means arranged as a coupler so that when light energy is transmitted into one of the first and second fiber attachment means substantially half of the light energy is transmitted to the other of the first and second fiber attachment means and half to its corresponding detector region, and when light energy is transmitted into the other of the first and second fiber attachment means substantially half of the light energy is transmitted to the one of the first and second fiber attachment means and half to its corresponding detector region.