Patent ID: 8606111

Claim:
A method of generating an output signal in a dense wavelength division multiplexing (DWDM) device, comprising: providing a bias current to a laser in the DWDM device; comparing an initial state of a transmitter including the laser to a maximum overshoot value; reducing the bias current to the laser to prevent or eliminate an overshoot condition of the bias current when the initial state exceeds the maximum overshoot value during power-up of the laser or the DWDM device, so as to prevent a change in output wavelength of the laser that would result in crosstalk; and optimizing an automatic power control (APC) loop, a thermoelectric control (TEC) loop, and an electro-absorption (EA) modulator control loop in the DWDM device to actively control the bias current during a change of operating conditions in the DWDM device.