Edge-coupled InGaAs/InP phototransistors for microwave radio fibre links

Currently, several ways are investigated concerning pico-cellular systems. Although optical feeding of base stations is involved, there are a lot of microwave signal transmission or generation schemes. Depending on the used scheme, the receiver will behave differently, either as a pure optoelectronic transceiver (microwave transmission) either as a non-linear optoelectronic system (optical microwave generation, optical locking of microwave oscillator, ...). In these fields, we present the work that we did on promising devices, i.e. InP/InGaAs edge-coupled heterojunction phototransistors in twoand three-terminal configuration. Three parts of this paper report modelling tools, device technology and characterization. Modelling tools include optical as well as optoelectronic modelling. A brief description of technological work follows. The characterization is carried out in terms of static response, frequency response and non-linear behaviour.