METHOD AND SYSTEM FOR CONTROLLING DRIVING CURRENT OF LASER DIODE IN WAVELENGTH DIVISION MULTIPLEXED-PASSIVE OPTICAL NETWORK

摘要

The present invention relates to a wavelength division multiplexing passive optical network (WDM-PON) for the optical transmitter, and more particularly to a system for controlling the drive current of the WDM-PON optical transmitter. ; WDM-PON drive current control system includes a plurality of laser diodes and the plurality of laser diodes and each of the plurality of individual terminals and a common terminal coupled to generate transmit optical signals in accordance with a drive current, and transfer of the optical transmitter according to the invention the optical multiplexer / demultiplexer variable optical attenuator and the variable optical attenuator that to attenuate the optical power of the plurality of through individual terminal receiving an optical signal to the input and a photo diode for generating a monitoring current optical signal output containing controlling the attenuation values, and calculating the optical power of the optical signal based on the monitored current to be outputted to the common terminal, and it is characterized in that a control unit for controlling the drive current based on the calculated optical power. ; Optical signal, optical power, WDM-PON, the drive current