Patent ID: 8503884

Claim:
A bidirectional optical transceiver comprising: an optical system to transmit/receive a beam to/from an optical fiber; an optical bench having an accommodating part to mount the optical system thereon and on which an optical-transmitting module to emit a horizontal beam to the optical system is mounted; and a multi-layer substrate in which an optical-receiving module for receiving a vertical beam from the optical system and a driving circuit for driving the optical-transmitting module are installed on different vertical layers and on which the optical bench is spaced mounted, wherein: the multi-layer substrate comprises an insulating space to electrically and optically isolate the optical-receiving module from the optical-transmitting module, the optical-receiving module is accommodated in the insulating space of the multi-layer substrate, the insulating space is closed by covering an upper portion of the insulating space having the optical-receiving module accommodated therein with the optical bench, the optical-transmitting module is installed on the optical bench which is isolated from the optical-receiving module accommodated in the insulating space, and the optical system changes a direction of a path of light of the received beam to a perpendicular direction and the received beam is focused on the optical-receiving module.