InP-InGaAs single HBT technology for photoreceiver OEIC's at 40 Gb/s and beyond

We describe an advanced InP-InGaAs-based technology for the monolithic integration of pin-photodiodes and SHBT-transistors. Both devices are processed using the same epitaxial grown layer structure. Employing this technology, we have designed and fabricated two photoreceivers achieving transimpedance gains of 170 /spl Omega//380 /spl Omega/ and optical/electrical bandwidths of 50 GHz/34 GHz. To the best of our knowledge, this is the highest bandwidth of any heterojunction bipolar transistor (HBT)-based photoreceiver optoelectronic integrated circuit (OEIC) published to date. We even predict a bandwidth of 60 GHz for the same circuit topology by a simple reduction of the photodiode diameter and an adjustment of the feedback resistor value.

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