Patent ID: 6944377
Filing Date: 2005-09-13
Classification: G02B

Abstract:
1. A laminated optical communication module, comprising: a substrate; a vertical waveguide that is formed in the substrate and that is for transmitting light in a thickness direction of the substrate; a horizontal waveguide that is formed in the substrate and that is for transmitting light in a planar direction of the substrate; and a light bending portion for optically coupling the vertical waveguide and the horizontal waveguide; wherein the substrate is a laminated body including a first substrate in whose surface a groove is formed and in which a reflective mirror is disposed on at least one end of the groove, and a second substrate layered to the surface of the first substrate in which the groove is formed and in which a through hole in communication with a portion of the groove where the reflective mirror is disposed is formed; wherein the horizontal waveguide comprises a first cavity formed by the groove and a first reflective film that covers the wall surfaces of the first cavity, and transmits light through its first cavity; wherein the vertical waveguide comprises a second cavity formed by the through hole and a second reflective film that covers the wall surfaces of the second cavity, and transmits light through its second cavity; and wherein the light bending portion comprises the reflective mirror, and due to reflection at the surface of the reflective mirror, the light transmission direction is changed from the thickness direction to the planar direction of the substrate or from the planar direction to the thickness direction of the substrate.