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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 17,
  • Issue 12,
  • pp. 2470-
  • (1999)

Performance of Optical Heterodyne PSK Systems with Costas Loop in Multichannel Environment for Nonlinear Second-Order PLL Model

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Abstract

Using the nonlinear second-order phase-locked loop (PLL) model the performance of the heterodyne coherent optical phase shift keying (PSK) systems with Costas loop in multichannel environment is considered in this paper for the first time. The shot noise of the corresponding photodiodes and adjacent channel interferences are described through the signal-to-noise ratio (SNR) in the loop bandwidth, while the laser phase noise is described through the normalized frequency fluctuations instead of the phase ones. The theory and results presented in this paper can be applied when analyzing and optimizing the performance in the region where the linear PLL model is not enough good.

[IEEE ]

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