An general analysis for front end performance of turned optical receiver for microwave subcarrier multiplexed lightwave system was presented. Formulas for front end circuits were deduced.

The plan of system unit composed of three levels, which are lightwave level, microwave level and TV level, is described.

In this paper, a high-sensitivity lightwave communication system is set up by using a mini-power near-infrared LED as a light emitter, a phototransistor as a photoelectric receiver.