Multifiber optic interconnects are attractive for high-throughput computer systems and asynchronous transfer mode (ATM) switching systems. We have developed a high-performance 10-fiber interconnect with each fiber operating at a high speed of 1 Gb/s. The modules have a receptacle for mechanically transferred push-on (MTP) multifiber push-pull connector. The hermetic package is surface mount type and solder reflowable. The transmitter (Tx) is DC-coupled and the receiver (Rx) is AC-coupled with a cutoffof7 kHz. The electrical interface is differential current mode logic (CML) or emitter coupled logic (ECL), and the optical interface is a 12-fiber connector. Single-mode glass fibers (9.5 tm) or multimode glass graded-index fibers (62.5 m) were used.Tx contains a laser-driver IC, while Rx contains pre-amplifler and postamplifler, and comparator circuits. All the ICs are -5.2 Vbipolar GaAs, and Tx + Rx consumes 4 W. The power in a fiber is about 100 jW. The back-to-back skew is less than 80 ps. For a non-return-to-zero (NRZ) 223l pseudo-random bit stream, the error rate was less than 1012with all the channels transmitting different signals simultaneously and a 100-m small-skew (1.2 ps/m) fiber ribbon. The link worked up to an atmosphere temperature of 80 °C.