InP/InGaAs bipolar phototransistor as a front-end photoreceiver for HPR distribution networks

The assessment of an improved InP/InGaAs phototransistor as a front-end photoreceiver for a hybrid fibre radio (HBF) link was realised. The phototransistor performances were investigated as a direct photodetector and as an up-converting mixer. A preliminary system evaluation of the device was performed.