Optical communication device, reception apparatus, transmission apparatus, and transmission and reception system

An optical communication device comprising:

• a signal processing substrate having a signal processing circuit and a drive circuit attached thereto, the signal processing circuit being electrically connected to the drive circuit on the signal processing substrate;
• an interposer substrate having a first surface side and a second surface side opposite to the first surface side;
• and
• a through via extending through the interposer substrate, the through via being configured to electrically connect an optical element disposed on the first surface side of the interposer substrate to the drive circuit in a region where the drive circuit is located on the signal processing substrate.

A reception system comprising:

• a signal processing circuit;
• a drive circuit substrate having a first surface side and a second surface side opposite to the first surface side;
• and
• a first through via extending through the drive circuit substrate, the first through via being configured to electrically connect a light receiving element disposed on the first surface side of the drive circuit substrate to a drive circuit disposed on the second surface side of the drive circuit substrate.