A GaAs, enhanced/depletion mode, self-aligned, refractory-gate, MESFET chip process and circuit family have been developed for the integration of fiber-optic data link functions (e.g. photodetection, amplification, clock recovery, and deserialization) on a single chip. These authors describe the process and present results on integrating a complete optical receiver, including the photodiode and clock recovery circuits, on one chip. The chip functions use over 2000 devices, and perform at 1-GB/s, while dissipating less than 300 mW of heat. This chip is the most complex high-performance optoelectronic integrated circuit reported to date. >