Abstract
A custom 90-nm bulk digital CMOS switch driver is codesigned and integrated
with a silicon photonic switch. A photonic device model is created within
the electronic design environment, facilitating driver optimization and performance
evaluation prior to fabrication. The fabricated drivers implemented in two
variations produce transition times as low as 50 ps and generate open eye
diagrams using supply voltages ranging from 0.8 to 5 V. The driver is hybrid
integrated with a broadband low-power silicon photonic 2$\,\times\,$2 switch, based on a modified
Mach–Zehnder interferometer. The switch has demonstrated operation over
100nm of spectral bandwidth with less than ${-}17$-dB crosstalk, greater than 25 $^\circ$C tolerance
to temperature variations, and compatibility with 1-V driving signals. The
integration demonstrates the interoperability of the switch and driver, which
together achieve transition times below 4 ns and average power consumption
of 2 mW. Finally, throughput bandwidth of 160 Gb/s is demonstrated for all
switch configurations via eye diagrams and bit error rate curves.
© 2011 IEEE
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