Patent Number: 8,718,413

Title: Optical modulation apparatus and optical modulation/integration apparatus

Abstract: An optical modulation apparatus includes: a substrate; a first optical waveguide and a second optical waveguide formed at an interval on the substrate; an electrode provided along at least one of the first optical waveguide and the second optical waveguide; and a power source coupled to the electrode to apply a voltage to at least one of the first optical waveguide and the second optical waveguide, wherein at least one of the first optical waveguide and the second optical waveguide includes a diffraction grating region where light having a wavelength .lamda. is reflected, and a phase shift region where a phase of the light is shifted by an amount in a range of 0 to .lamda./2.

Inventors: Akiyama; Suguru (Kawasaki, JP)

Assignee: Fujitsu Limited

International Classification: G02F 1/35 (20060101)

Expiration Date: 5/06/12018