An optical circuit with integrated optic components such as light
emitter, photodetector, modifier, and optical waveguide.
Optical circuits are created by IC fabrication process, especially
the multilayer thin film deposition technique including insulation layer, or silicon on insulator
(SOI). The existing optics system converts optical signal to electrical signal, and converts again
to the optical signal after electrical signal processing. However, the integrated optics device
performs the signal processing directly in the optical integrated circuit, thereby making drastic
size and weight reduction, power saving, and increasing processing speed.