Optical correlator that uses cesium vapor

Ivan Biaggio, B. Ai, R. J. Knize, Jouni P. Partanen, Robert W. Hellwarth

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)


We obtain the correlation pattern between two amplitude-modulated input images of 36 and 280 random black and white pixels, using the standard degenerate four-wave-mixing geometry of 852-nm optical beams in a 1-mm-thick cesium-vapor cell. The total optical input power is 3.2 mW to obtain 0.4 nW of power in the correlation pattern. We verified that the buildup time of the four-wave-mixing signal is −30 ns. Using the random patterns, we analyze the performance of the cesium optical correlator in terms of the number of pixels that can be processed and the number of photons per pixel used. We show how to scale our experimental results for the efficiency of the cesium correlator to images containing a larger number of pixels.

Original languageEnglish
Pages (from-to)1765-1767
Number of pages3
JournalOptics Letters
Issue number21
Publication statusPublished - 1 Nov 1994
MoE publication typeA1 Journal article-refereed


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