Operation of an optoelectronic crossbar switch containing a terabit-per-second free-space optical interconnect

A. C. Walker, Stuart J. Fancey, M. P Y Desmulliez, M. G. Forbes, J. J. Casswell, G. S. Buller, M. R. Taghizadeh, J. A B Dines, C. R. Stanley, G. Pennelli, A. R. Boyd, J. L. Pearson, Paul Horan, Declan Byrne, J. Hegarty, Sven Eitel, Hans Peter Gauggel, Karl Heinz Gulden, Alain Gauthier, Philippe BenabesJean Louis Gutzwiller, Michel Goetz, Jacques Oksman

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The experimental operation of a terabit-per-second scale optoelectronic connection to a silicon very-large-scale-integrated circuit is described. A demonstrator system, in the form of an optoelectronic crossbar switch, has been constructed as a technology test bed. The assembly and testing of the components making up the system, including a flip-chipped InGaAs-GaAs optical interface chip, are reported. Using optical inputs to the electronic switching chip, single-channel routing of data through the system at the design rate of 250 Mb/s (without internal fan-out) was achieved. With 4000 optical inputs, this corresponds to a potential aggregate data input of a terabit per second into the single 14.6 × 15.6 mm CMOS chip. In addition 50-Mb/s data rates were switched utilizing the full internal optical fan-out included in the system to complete the required connectivity. This simultaneous input of data across the chip corresponds to an aggregate data input of 0.2 Tb/s. The experimental system also utilized optical distribution of clock signals across the CMOS chip. © 2005 IEEE.

Original languageEnglish
Pages (from-to)1024-1036
Number of pages13
JournalIEEE Journal of Quantum Electronics
Issue number7
Publication statusPublished - Jul 2005


  • Optical interconnects
  • Smart-pixels


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