InP DHBT technology for 100 Gbit/s applications

In this paper, we report a manufacturable InP DHBT technology, suitable for medium scale mixed-signal and monolithic microwave integrated circuits. The MBE grown InP-based DHBTs with an emitter area of 1 × 4 µm2 exhibited peak cutoff frequencies (fT and fMAX) > 300 GHz, and a breakdown voltage (BVCEo) of ~ 5 V. The potential of this technology has been first assessed by the realization of a voltage controlled oscillator (VCO), exhibiting a high output power and a large tuning range. Subsequently, a demultiplexer (DEMUX) suitable for 100 Gbit/s fibre optical links, has been successfully fabricated and operated up to 110 Gbit/s.