Optical transmission module

Abstract

In a surface-mounted optical transmission module, a laser diode serving as a light emitting device that converts an electric signal into an optical signal, and an optical waveguide serving as an optical transmission line that transmits and outputs the optical signal from the laser diode are placed on a substrate. A driving device for controlling the driving of the laser diode is placed at a predetermined position on the upper surface of the optical waveguide element, which is on the same side as an optical waveguide element (on the downstream side in the optical-signal transmitting direction) relative to the laser diode. This configuration eliminates the necessity of placing the driving device at a position distanced from the laser diode, whereby the size of the optical transmission module can be reduced, and this allows the optical transmission module to transmit optical signals at high speed.

Dependencies are inferred from the claim text.