Craig A. Hornbuckle

SerDes chips for 100Gbps dual-polarization DQPSK

The required features of SerDes chips for 100Gbps Ethernet and OTN optical data transmission are discussed. As a baseline technology for 100Gbps SerDes, 40Gbps DPQSK serializer chip performance is presented.

A 39.8Gb/s to 43.1Gb/s SFI-5 compliant 16:1 multiplexer and 1:16 demultiplexer for optical communication systems

A 16:1 multiplexer and 1:16 demultiplexer, designed using a 0.18 /spl mu/m SiGe BiCMOS process, operates at data rates between 39.8 Gb/s and 43.1 Gb/s. The demultiplexer features an integrated CDR (clock and data recovery) with an input sensitivity of 25 mV at 40 Gb/s and 40 mV at 43 Gb/s. The multiplexer has an integrated CMU (clock multiplier unit) and an output voltage swing of 1 Vp-p differential with 165 fs rms jitter. Both chips are SFI-5 compliant. The multiplexer and demultiplexer dissipate 10 W and 4.7 W of power, respectively, using supply voltages of -3.6 V and 1.2 V (or 1.8 V).

A transimpedance amplifier for OC-768 applications designed using a SiGe HBT BiCMOS technology

TIAs were designed with transimpedance gains of 230 /spl Omega/ and 240 /spl Omega/, with corresponding bandwidths of 30 GHz and 29 GHz, respectively. Because the simulated results in the 50 /spl Omega/ test environment match reasonably well with the measured results, it is expected that the TIA performance, when packaged with an appropriate photodiode, will improve, as the simulated results for a TIA with a photodiode indicate.

A 4 by 28.3 Gb/s SFI-S SerDes in 130 nm SiGe

A 4 by 28.3 to 10 by 11.32 Gb/s SFI-S compliant two chip SerDes for 100 Gb/s applications was fabricated using IBMs SiGe 130 nm 8HP process (210 GHz fT). The Multiplexer receives 10 channels, plus the SFI-S deskew channel at 11.32 Gb/s, and outputs four lanes at 28.3 Gb/s, with a maximum output of 1.2 Vpp differential. The Demultiplexer receives four channels at 28.3 Gb/s, recovers clock and data with a sensitivity of 40 mV, and outputs 10 channels, plus the SFI-S deskew channel at 11.32 Gb/s.