Coherent optical PSK systems with balanced PLL receivers for nonlinear PLL model

Using the nonlinear second order PLL model the performance of the coherent optical PSK systems with balanced PLL receivers is considered in this paper. The shot noise of the corresponding photodiodes and the data-to-phaselock crosstalk are described through the signal-to-noise ratio in the loop band...

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Bibliographic Details
Main Authors: Djordjevic, I.B., Stefanovic, M.C., Djordjevic, G.T.
Format: Conference Proceeding
Language:English
Subjects:
Bandwidth
Nonlinear optics
Optical crosstalk
Optical noise
Optical receivers
Phase locked loops
Phase noise
Phase shift keying
Photodiodes
Signal to noise ratio
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Summary:Using the nonlinear second order PLL model the performance of the coherent optical PSK systems with balanced PLL receivers is considered in this paper. The shot noise of the corresponding photodiodes and the data-to-phaselock crosstalk are described through the signal-to-noise ratio in the loop bandwidth, while the laser phase noise is described through the normalized frequency fluctuations instead of the phase ones. The performance comparison between the linear and nonlinear second order PLL model is given and the approximation error is assessed. The theory and results presented here can be applied for analyzing and optimizing the performance in the region where the linear PLL model is not good enough.
DOI:10.1109/TELSKS.1999.804757