CONTROLLED NONLINEARITY MONOLITHIC INTEGRATED OPTOELECTRONIC MIXING RECEIVER

A novel monolithic integrated optoelectronic mixing receiver with low conversion loss is demonstrated. It consists of a GaAs MSM photodetector mixer and a two-stage transimpedance preamplifier. By modulating the bias of the MSM photodetector with a local oscillator, the information signal on an optical carrier is down-converted to an electrical intermediate frequency. The mixing receiver nonlinearity can be controlled by simply changing the bias values to the MSM photodetector. The optoelectronic mixer has applications in subcarrier multiplexed lightwave distribution systems.