Demonstration of WDM weighted addition for principal component analysis

Alexander N. Tait, John Chang, Bhavin J. Shastri, Mitchell A. Nahmias, Paul R. Prucnal

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


We consider an optical technique for performing tunable weighted addition using wavelength-division multiplexed (WDM) inputs, the enabling function of a recently proposed photonic spike processing architecture [J. Lightwave Technol., 32 (2014)]. WDM weighted addition provides important advantages to performance, integrability, and networking capability that were not possible in any past approaches to optical neurocomputing. In this letter, we report a WDM weighted addition prototype used to find the first principal component of a 1Gbps, 8-channel signal. Wideband, multivariate techniques have immediate relevance to modern radio systems, and photonic spike processing networks enabled by WDM could open new domains of information processing that bring unprecedented bandwidth and intelligence to problems in radio communications, ultrafast control, and scientific computing.

Original languageEnglish (US)
Pages (from-to)12758-12765
Number of pages8
JournalOptics Express
Issue number10
StatePublished - 2015

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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