Monolithic silicon integration of scaled photonic switch fabrics, CMOS logic, and device driver circuits

Benjamin G. Lee, Alexander V. Rylyakov, William M.J. Green, Solomon Assefa, Christian W. Baks, Renato Rimolo-Donadio, Daniel M. Kuchta, Marwan H. Khater, Tymon Barwicz, Carol Reinholm, Edward Kiewra, Steven M. Shank, Clint L. Schow, Yurii A. Vlasov

Research output: Contribution to journalArticlepeer-review


We demonstrate 4 × 4 and 8 × 8 switch fabrics in multistage topologies based on 2 × 2 Mach-Zehnder interferometer switching elements. These fabrics are integrated onto a single chip with digital CMOS logic, device drivers, thermo-optic phase tuners, and electro-optic phase modulators using IBM's 90 nm silicon integrated nanophotonics technology. We show that the various switch-and-driver systems are capable of delivering nanosecond-scale reconfiguration times, low crosstalk, compact footprints, low power dissipations, and broad spectral bandwidths. Moreover, we validate the dynamic reconfigurability of the switch fabric changing the state of the fabric using time slots with sub-100-ns durations. We further verify the integrity of high-speed data transfers under such dynamic operation. This chip-scale switching system technology may provide a compelling solution to replace some routing functionality currently implemented as bandwidth-and power-limited electronic switch chips in high-performance computing systems.

Original languageEnglish (US)
Article number6588351
Pages (from-to)743-751
Number of pages9
JournalJournal of Lightwave Technology
Issue number4
StatePublished - Feb 15 2014
Externally publishedYes


  • CMOS integrated circuits
  • optical switches
  • photonic integrated circuits

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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