Communication Models for a Free-Space Optical Cross-Connect Switch

David Er-El*, Dror G. Feitelson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We design and analyze communication algorithms for an optical switch based on the electroholographic effect, that provides capabilities for configuration changes and a limited multicast. As configuration changes incur a high overhead, we suggest the use of a high-speed forwarding unit as part of the network interface. We develop broadcast algorithms that trade off the number of configuration changes and forwarding operations in order to achieve the minimal completion time. For general point-to-point communication, we use the limited multicast to create a spanning topology along which messages can be forwarded. This requires care to avoid collisions, but is still preferable to using configuration changes if the topology is rich enough but still has a low degree.

Original languageAmerican English
Pages (from-to)19-48
Number of pages30
JournalJournal of Supercomputing
Issue number1
StatePublished - Jan 2004

Bibliographical note

Funding Information:
This research was supported by the Ministry of Science and by the Wolfson Foundation for Scientific Research.


  • All-optical network
  • Broadcast algorithm
  • Circuit switching
  • Collision avoidance
  • Electroholographic switch
  • Forwarding
  • Spanning topology


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