Free–space optical cross–connect switch by use of electroholography

Benny Pesach, Guy Bartal, Eli Refaeli, Aharon J. Agranat, Joel Krupnik, Dan Sadot

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


An electrically controlled holographic switch is proposed as a building block for a free–space optical interconnection network. The switch is based on the voltage–controlled photorefractive effect in KLTN crystals at the paraelectric phase. It is built of electrically controlled Bragg gratings stored in the volume of the crystal. A compact switch that connects four high–speed fiber–optic communication channels with high efficiency is demonstrated experimentally. The switch performance is investigated and optimized. This switch is extremely attractive for cascaded switching arrays such as those found in multistage interconnect networks.

Original languageAmerican English
Pages (from-to)746-758
Number of pages13
JournalApplied Optics
Issue number5
StatePublished - 10 Feb 2000


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