Abstract

Optical code division multiplexing (OCDM) using optical bipolar code and coherent detection is a new multiplexing method for future fiber-optic communication networks. Some optical bipolar codes, which are described by the combination of phase of optical chip pulses, with a repetition frequency 10 GHz are generated experimentally. Temporal matched filtering for the 10 Gb/s OCDM is demonstrated using optical encoder and decoder, and their fundamental properties are investigated. Effect of interference code is shown experimentally and discussed. The novel coherent detection system with autocorrelation sidelobe suppression using balanced detector and local light source is proposed. The pseudocoherent detection is demonstrated experimentally by using a clock pulse. Advantageous properties of the coherent detection are shown. The fundamental functions to realize the gigabit rate OCDM system is revealed.

[IEEE ]

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Appl. Opt.

J. Lightwave Technol.

P. Prucnal and M. Santoro, "Spread spectrum fiber optic local area network using optical processing," J. Lightwave Technol., vol. 4, pp. 307-314, May 1986.

D. D. Sampson, R. A. Griffin, and D. A. Jackson, "Photonic CDMA by coherent matched filtering using time-addressed coding in optical ladder networks," J. Lightwave Technol., vol. 12, pp. 2001-2010, 1994.

Y. L. Chang and M. E. Marhic, "Fiber-optic ladder networks for inverse decoding coherent CDMA," J. Lightwave Technol., vol. 10, pp. 1952-1962, 1992.

M. E. Marhic, "Coherent optical CDMA networks," J. Lightwave Technol., vol. 11, pp. 854-864, May/June 1993.

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