TRANSMITTER OPTICAL MODULE IMPLEMENTED WITH A PLURALITY OF SIGNAL SOURCES

摘要

A transmitter optical module that implements with two or more laser diodes (LDs) therein is disclosed. The LDs are mounted on a common sub-mount independent of driving circuits and driven by the driving circuits in the shunt-driving mode. The cathode of the LDs are independently, namely, isolated from the ground of the neighbor LDs, connected to the ground within the driving circuits but floated from the chassis ground.

主权项

1. A transmitter optical module for outputting a wavelength multiplexed optical signal, comprising:
two or more laser diodes (LD) each having a cathode and an anode and emitting an optical signal by flowing a driving current from the anode to the cathode; a plurality of sub-mounts each providing at least two die pads for mounding at least two LDs independently thereon and at least two bonding pads for providing driving currents independently to the at least two LDs, the die pads and the bonding pads being independent on the sub-mounts; two or more drivers each corresponding to the LDs and having respective signal grounds therein, the drivers including respective switching transistors that shunt the driving currents provided to the anodes of the LDs; and a housing that encloses the LDs, the sub-mounts, and the drivers therein, the housing providing a chassis ground, wherein the cathodes of the LDs are independently wire-bonded to the signal grounds in the respective drivers without being connected to the chassis ground.