Patent ID: 9075254
Filing Date: 2015-07-07
Classification: G02B,G02F

Abstract:
1. An optical waveguide device module comprising: an optical waveguide device including a substrate having an electro-optic effect, an optical waveguide formed in the substrate, and a control electrode for controlling light waves propagated through the optical waveguide; a connection substrate including an interconnection, provided to the outside of the optical waveguide device, which is electrically connected to the control electrode; and a casing that accommodates the optical waveguide device and the connection substrate therein, wherein the control electrode includes a signal electrode and ground electrodes disposed so as to sandwich the signal electrode, the connection substrate is provided with a signal line and ground lines disposed so as to sandwich the signal line, a distance W the control electrode has a portion in which the distance between the ground electrodes is smaller than the distance W the optical waveguide device module includes ground interconnections that connect the optical waveguide device and the ground lines of the connection substrate, wherein a distance W between the ground interconnections measured at the point where the ground interconnections connect with the ground lines is smaller than the distance W