All-optical binary counter

Alistair J. Poustie, R.J. Manning, A.E. Kelly, K.J. Blow

Research output: Contribution to journalArticlepeer-review


We experimentally demonstrate an all-optical binary counter composed of four semiconductor optical amplifier based all-optical switching gates. The time-of-flight optical circuit operates with bit-differential delays between the exclusive-OR gate used for modulo-2 binary addition and the AND gate used for binary carry detection. A movie of the counter operating in real time is presented.
Original languageEnglish
Pages (from-to)69-74
Number of pages6
JournalOptics Express
Issue number3
Publication statusPublished - 31 Jan 2000

Bibliographical note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.


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