Simple nonlinear interferometer-based all-optical thresholder and its applications for optical CDMA

Konstantin Kravtsov, Paul R. Prucnal, Mikhail M. Bubnov

Research output: Contribution to journalArticle

73 Scopus citations

Abstract

We present an experimental demonstration of an ultrafast all-optical thresholder based on a nonlinear Sagnac interferometer. The proposed design is intended for operation at very small nonlinear phase shifts. Therefore, it requires an in-loop nonlinearity lower than for the classical nonlinear loop mirror scheme. Only 15 meters of conventional (non-holey) silica-based fiber is used as a nonlinear element. The proposed thresholder is polarization insensitive and is good for multi-wavelength operation, meeting all the requirements for autocorrelation detection in various optical CDMA communication systems. The observed cubic transfer function is superior to the quadratic transfer function of second harmonic generation-based thresholders.

Original languageEnglish (US)
Pages (from-to)13114-13122
Number of pages9
JournalOptics Express
Volume15
Issue number20
DOIs
StatePublished - Oct 1 2007

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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