Mitigation of Rayleigh Backscattering inWavelength Division Multiplexing PassiveOptical Network Based on WS-ASKModulation

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Energy Pub Date : 2015-02-28 DOI:10.15662/IJAREEIE.2015.0402038

V. Mishra, Bramha S. Tripathi, Ambikesh P. Gupta

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引用次数: 2

Abstract

A novel integration scheme from time-division-multiplex passive optical network (TDMPON) to wavelength-division-multiplex PON (WDM-PON) using differential Quadreture phase-shift keying (DQPSK) for the downstream signal and wavelength-shifted amplitude-shift keying (WS-ASK) for the upstream signal is illustrated. The migration scheme does not change the existing fiber infrastructure. An optical filter is preinstalled at the optical networking unit (ONU) to select the desirable downstream wavelength for the WDM-PON and simultaneously demodulate the downstream DQPSK signal. Signal remodulation is used to generate the upstream signal by reusing the downstream wavelength. In the ONU, by wavelength shifting the upstream optical spectrum with respect to the downstream optical spectrum, the Rayleigh backscattering (RB) interference beat noise affecting the upstream signal can be significantly mitigated. The optimum bandwidth for the downstream DQPSK demodulation is analyzed.

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基于ws - ask调制的波分复用无源光网络瑞利后向散射抑制

提出了一种新的分多路无源光网络(TDMPON)与波分多路无源光网络(WDM-PON)的集成方案，该方案采用差分四分相移键控(DQPSK)作为下行信号，采用移波幅移键控(WS-ASK)作为上行信号。迁移方案不会改变原有的光纤基础设施。在光网络单元(ONU)上预装一个光滤波器，为WDM-PON选择所需的下游波长，同时解调下游DQPSK信号。信号调制是通过复用下游波长来产生上游信号。在ONU中，通过对上游光谱相对于下游光谱进行波长移动，可以显著减轻影响上游信号的瑞利后向散射(Rayleigh backscattering, RB)干扰噪声。分析了下游DQPSK解调的最佳带宽。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Journal of Advanced Research in Electrical, Electronics and Instrumentation Energy

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