Optical module

An optical module comprising:

• a first circuit board on which a connector socket is mounted;
• an optical transceiver module that is electrically connected to the first circuit board via the connector socket;
• a heat sink;
• and
• a heat dissipating sheet, wherein
• the optical transceiver module comprises:
• a second circuit board on which an electrical-to-optical converter, a drive circuit that drives the electrical-to-optical converter, an optical-to-electrical converter, and a current-to-voltage conversion circuit that converts an output current of the optical-to-electrical converter into a voltage signal are face-down mounted;
• and
• an optical waveguide that guides an optical signal generated by the electrical-to-optical converter to an output end of the optical transceiver module, and that guides an optical signal input to the optical transceiver module to the optical-to-electrical converter, and wherein
• the heat sink is thermally coupled to the electrical-to-optical converter, the drive circuit, the optical-to-electrical converter, or the current-to-voltage conversion circuit, or any combination thereof via the heat dissipating sheet, and the heat sink presses the optical transceiver module onto the first circuit board.