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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 22,
  • Issue 6,
  • pp. 1463-
  • (2004)

Optical Code-Division Multiple Access Using Broad-Band Parametrically Generated Light

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Abstract

A novel approach for an optical direct-sequence spread spectrum is presented. It is based on the complementary processes of broad-band parametric down-conversion and up-conversion. With parametric down-conversion, a narrow-band continuous-wave (CW) optical field is transformed into two CW broad-band white-noise fields that are complex conjugates of each other. These noise fields are exploited as the key and conjugate key in optical direct-sequence spread spectrum. The inverse process of parametric up-conversion is then used for multiplying the key by the conjugate key at the receiver in order to extract the transmitted data. A complete scheme for optical code-division multiple access (OCDMA) based on this approach is presented. The salient feature of the approach presented in this paper is that an ideal white-noise key is automatically generated,leading to high-capacity versatile code-division multiple-access configurations.

© 2004 IEEE

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