InGaP/GaAs HBT-IC chipset for 10-Gb/s optical receiver

We have developed an IC chipset for 10 Gb/s optical transmission systems using high-speed and reliable InGaP/GaAs HBTs. The amplifiers showed over 10 GHz bandwidth and the decision circuit showed a very small decision ambiguity of 6 mV at 10 Gb/s. Using these ICs, we achieved an optical receiver sensitivity of -19.6 dBm, and -36.2 dBm (Pe=10/sup -12/) with an optical preamplifier, for an STM-64 signal. The deviation of receiver sensitivity was within 1 dB over a wide temperature range of 0 to 85/spl deg/C.