Secure transmission over an existing public WDM lightwave network

Bernard B. Wu, Paul R. Prucnal, Evgenii E. Narimanov

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


We develop a spread-spectrum-based approach to security-enhanced transmission over an existing public wavelength-division-multiplexing (WDM) lightwave network. Secure transmission for a dedicated user is achieved by overlaying a covert channel onto a multichannel WDM network. The covert channel is spectrally encoded using the technique of frequency hopping and then temporally spread by a dispersive element, with the resulting average power below the noise floor in the fiber. The presence of the WDM channels provides an ad hoc security expansion and increases the difficulty for an eavesdropper to intercept and decode the secure signal.

Original languageEnglish (US)
Pages (from-to)1870-1872
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number17
StatePublished - Sep 1 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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