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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 7, Iss. 1 — Jul. 3, 2000
  • pp: 2–9

Effects of Optical Layer Impairments on 2.5 Gb/s Optical CDMA Transmission

Helena X. C. Feng, Antonio J. Mendez, Jonathan P. Heritage, and William J. Lennon  »View Author Affiliations

Optics Express, Vol. 7, Issue 1, pp. 2-9 (2000)

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We conducted a computer simulation study to assess the effects of optical layer impairments on optical CDMA (O-CDMA) transmission of 8 asynchronous users at 2.5 Gb/s each user over a 214-km link. It was found that with group velocity dispersion compensation, two other residual effects, namely, the nonzero chromatic dispersion slope of the single mode fiber (which causes skew) and the non-uniform EDFA gain (which causes interference power level to exceed signal power level of some codes) degrade the signal to multi-access interference (MAI) ratio. In contrast, four wave mixing and modulation due to the Kerr and Raman contributions to the fiber nonlinear refractive index are less important. Current wavelength-division multiplexing (WDM) technologies, including dispersion management, EDFA gain flattening, and 3rd order dispersion compensation, are sufficient to overcome the impairments to the O-CDMA transmission system that we considered.

© Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2350) Fiber optics and optical communications : Fiber optics imaging

ToC Category:
Research Papers

Original Manuscript: May 31, 2000
Published: July 3, 2000

Helena Feng, Antonio Mendez, Jonathan Heritage, and William Lennon, "Effects of optical layer impairments on 2.5 Gb/s optical CDMA transmission," Opt. Express 7, 2-9 (2000)

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