Optical technology for energy efficient I/O in high performance computing Academic Article uri icon


  • Future high-performance computing systems will require optical I/O to achieve their aggressive bandwidth requirements of multiple terabytes per second with energy efficiency better than 1 pJ/b. Near-term optical I/O solutions will integrate optical and electrical components in the package, but longer-term solutions will integrate photonic elements directly into the CMOS chip to further improve bandwidth and energy efficiency. The presented near-term optical I/O uses a customized package to assemble CMOS integrated transceiver circuits, discrete VCSEL/detector arrays, and polymer waveguides. Circuit simulations predict this architecture will achieve energy efficiency better than 1 pJ/b at the 16 nm CMOS technology node. Monolithic photonic CMOS process technology enables higher bandwidth and improved energy efficiency for chip-to-chip optical I/O through integration of electro-optical polymer based modulators, silicon nitride waveguides, and polycrystalline germanium (Ge) detectors into a CMOS logic process. Experimental results for the photonic CMOS ring resonator (RR) modulators and Ge detectors demonstrate performance at up to 40 Gb/s and analysis predicts that photonic CMOS will eventually enable energy efficiency of 0.3 pJ/b with 16 nm CMOS. Optical interconnect technologies with multilane communication or wavelength-division multiplexing will further increase bandwidth to provide the multiple-terabyte-per-second optical interconnect solution that enables scaling of high-performance computing into and beyond the tera-scale era. 2010 IEEE.

published proceedings

  • IEEE Communications Magazine

altmetric score

  • 3

author list (cited authors)

  • Young, I. A., Mohammed, E. M., Liao, J., Kern, A. M., Palermo, S., Block, B. A., Reshotko, M. R., & Chang, P.

citation count

  • 50

complete list of authors

  • Young, Ian A||Mohammed, Edris M||Liao, Jason TS||Kern, Alexandra M||Palermo, Samuel||Block, Bruce A||Reshotko, Miriam R||Chang, Peter LD

publication date

  • January 2010