Optical module

An optical module comprising:

• a Si photonic lightwave circuit including an optical waveguide formed of a Si core and a SiO2 cladding, the optical waveguide tilted on an output end surface at an oblique angle with respect to a direction perpendicular to the output end surface;
• and
• an optical fiber block fixing an optical fiber array at the same oblique angle as the optical waveguide,
• wherein a center of the optical waveguide on the output end surface is shifted from a center of a side surface of the Si photonic lightwave circuit including the output end surface in a direction to which the optical waveguide is tilted, and
• the optical fiber array is bended between a second module and the optical module on which the Si photonic lightwave circuit is mounted such that the optical fiber array does not overlap the second module, wherein the optical module and the second module are mounted on a board and arranged such that the second module faces the side surface including the output end surface.