Impact of Rayleigh backscattering on single/dual feeder fiber WDM-PON architectures based on array waveguide gratings

Abstract

The performance of colorless wavelength-division multiplexing passive optical network (WDM-PON) systems suffers from transmission impairments due to Rayleigh backscattering (RB). A single feeder fiber colorless WDM-PON architecture was modeled, simulated and analyzed at 25 km distance that sustained the noise induced by RB. We analytically compared the performances between single feeder and dual feeder WDM-PON architectures based on array waveguide gratings (AWGs). For single feeder WDM-PON, the high extinction ratios in both return-to-zeros (RZ)-shaped differential phase shift keying (DPSK) downstream and intensity remodulated upstream data signals helped to increase the tolerance to the noise induced by RB. However, a cost effective colorless system in dual feeder WDM-PON architecture was achieved without any optical amplification and dispersion compensation, low power penalty. These results illustrate that single feeder fiber architecture was cost effective in terms of deployment having a power penalty, while dual feeder fiber had lower power penalty thereby with better performance. Simulation results show that downstream and upstream signals achieved error-free performance at 10-Gbps with negligible penalty and enhanced tolerance to the noise induced by RB over 25 km single mode fiber.

Keywords

wavelength division multiplexed-passive optical network (WDM-PON) / Rayleigh backscattering (RB) / differential phase shift keying (DPSK) / arrayed waveguide grating (AWG)

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Acknowledgements

This work was supported in part by the National Basic Research Program (No. 2010CB328204), the National High Technology Research and Development Program (No. 2012AA011301), the National Natural Science Foundation of China (Grant No. 60932004), the Research Fund for the Doctoral Program of Higher Education (RFDP Project) (No. 20090005110013) and the Fundamental Research Funds for the Central Universities (No. 2011RC0406).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg