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Mathematical modeling and statistical analysis of SPE-OCDMA systems utilizing second harmonic generation effect in thick crystal receivers

Matinfar, M. D ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1117/12.852365
  3. Abstract:
  4. In this paper we analytically study and evaluate the performance of a Spectral-Phase-Encoded Optical CDMA system for different parameters such as the user's code length and the number of users in the network. In this system an advanced receiver structure in which the Second Harmonic Generation effect imposed in a thick crystal is employed as the nonlinear pre-processor prior to the conventional low speed photodetector. We consider ASE noise of the optical amplifiers, effective in low power conditions, besides the multiple access interference (MAI) noise which is the dominant source of noise in any OCDMA communications system. We use the results of the previous work which we analyzed the statistical behavior of the thick crystals in an optically amplified digital lightwave communication system to evaluate the performance of the SPE-OCDMA system with thick crystals receiver structure. The error probability is evaluated using Saddle-Point approximation and the approximation is verified by Monte-Carlo simulation. © 2009 SPIE-OSA-IEEE
  5. Keywords:
  6. Lightwave communication systems ; Second harmonic generation ; Spectral phase encoded OCDMA ; Ultra-high speed detection scheme ; ASE noise ; Code length ; Communications systems ; Error probabilities ; Low power ; Low speed ; Mathematical modeling ; Monte Carlo simulation ; Optical amplifier ; Optical CDMA ; Preprocessors ; Receiver structure ; Saddle-point approximation ; Source of noise ; Statistical analysis ; Statistical behavior ; Ultra high speed ; Code division multiple access ; Crystal structure ; Crystals ; Harmonic analysis ; Light amplifiers ; Multiple access interference ; Nonlinear optics ; Optoelectronic devices ; Probability ; Probability density function ; Radio interference ; Solar radiation ; Harmonic generation
  7. Source: Proceedings of SPIE - The International Society for Optical Engineering ; Volume 7631 , 2009 ; 0277786X (ISSN)
  8. URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/7631/1/Mathematical-modeling-and-statistical-analysis-of-SPE-OCDMA-systems-utilizing/10.1117/12.852365.short?SSO=1