Rayleigh backscattering minimization in single fiber colorless WDM-PON using intensity remodulation technique
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Abstract:
The performance of colorless wavelength-division multiplexed passive optical network (WDM-PON) systems suffers from the transmission impairments mainly due to Rayleigh backscattering (RB). In this paper, we propose and demonstrate a single fiber colorless WDM-PON which enhances the tolerance to RB induced noise. The high extinction ratio in both return-to-zero (RZ)-shaped differential phase shift keying (DPSK) downstream (DS) data signal and intensity-remodulated upstream (US) data signal helps to improve the tolerance to RB induced noise. Simulation results show that downstream and upstream signals can achieve error-free performance at 10 Gbit/s with negligible penalty and improve the tolerance to RB induced noise over 25 km standard single-mode fiber.
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This work has been supported by the National Basic Research Program of China(No.2010CB328300), the National Natural Science Foundation of China (Nos.61077050, 61077014 and 60932004), the Beijing University of Posts and Telecommunications (BUPT) Young Foundation (No.2009CZ07), the Fundamental Research Funds for the Central Universities (Nos.2011RC0307 and 2011RC0314), and the Open Foundation of State Key Laboratory of Optical Communications Technologies and Networks (WRI) (No.2010-OCTN-02).
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