Andrew L. Adamiecki

Compact High-Speed InP DQPSK Modulator

We present a novel InP differential quadrature phase-shift-keying modulator design comprised of two electroabsorption modulators in a three-arm interferometer. The modulator is extremely compact, measuring only 1500 mum times 250 mum. We demonstrate it at 21.4 Gb/s and investigate preliminary performance at 107 Gb/s.

Transmission of 107-Gb/s DQPSK over Verizon 504-km Commercial LambdaXtreme® Transport System

A 107-Gb/s field trial was conducted on a traffic carrying long-haul LambdaXtreme® transport platform over an active 504-km Verizon route in Florida thus proving upgradeability to 100 G of the Alcatel-Lucent 50-GHz spaced ULH DWDM system.

Multiplexing and DQPSK Precoding of 10.7-Gb/s Client Signals to 107 Gb/s Using an FPGA

We implemented a real-time DQPSK precoder for 107-Gb/s data, together with a highspeed channel alignment scheme and the required rate adaptation from 10.7 Gb/s to 13.375 Gb/s, on a Xilinx Virtex II Pro X FPGA.

42.7-Gb/s Modulation with a Compact InP Mach-Zehnder Transmitter

We demonstrate 42.7-Gb/s operation of a compact InP Mach-Zehnder transmitter designed for 10.7 Gb/s. Despite the modulators steep frequency roll-off beyond 15 GHz, both optical duobinary modulation and optically equalized non return-to-zero yield excellent performance.