Title :
Raman Crosstalk Suppression in NG-PON2 Using Optimized Spectral Shaping
Author :
Cantono, Mattia ; Curri, Vittorio ; Gaudino, Roberto
Author_Institution :
Dipt. di Elettron. e Telecomun., Politec. di Torino, Turin, Italy
Abstract :
In this paper, we present an innovative proposal to mitigate the effect of Raman crosstalk in the interaction between NG-PON2 TWDM-PON channels and legacy RF-video by electrical spectral shaping on the TWDM NRZ data stream obtained through electrical FIR filtering. We find an analytical and closed form solution on FIR filter taps that, for a given target spectral shaping, gives the absolute minimum amount of intersymbol interference on the TWDM data. Then, we propose techniques to implement these FIR filters with reasonable system complexity. We found that our proposed technique is applicable to all classes (up to E2 PON, +11 dBm transmitted downstream power) with less than 0.5 dB power penalty on TWDM channels even in the worst-case scenario of RF-video still based on analog channels on the lower part of the spectrum.
Keywords :
FIR filters; intersymbol interference; optical communication equipment; optical crosstalk; optical fibre filters; optical fibre networks; optical information processing; passive optical networks; time division multiplexing; wavelength division multiplexing; FIR filter taps; NG-PON2 TWDM-PON channels; RF-video still; Raman crosstalk suppression; TWDM NRZ data stream; TWDM channels; analog channels; analytical solution; closed form solution; electrical FIR filtering; electrical spectral shaping; intersymbol interference; legacy RF-video; optimized spectral shaping; power penalty; system complexity; target spectral shaping; Crosstalk; Encoding; Finite impulse response filters; Optical crosstalk; Optical signal processing; Passive optical networks; Standards; NG-PON2; NGPON2; Optical fiber communication; optical fiber communication; passive optical networks;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2015.2501058