Evaluation of SiGe multiple quantum well modulators for short-reach, dense wavelength division multiplexed optical interconnects

By modeling temperature-dependent SiGe MQW electroabsorption, we calculate the number of allowed DWDM channels as a function of operating temperature, applied voltage, and a figure of merit related to the laser power penalty. We find that 20 to 40 DWDM channels at 100 GHz and 50 GHz channel spacing is possible in DWDM links with a ~12° temperature range with less than a 1 dB laser power penalty compared to the optimum single channel, single temperature case. The same number of channels can be supported over a 37° temperature range with a 3 dB power penalty.