Title :
Enhanced tolerance of rayleigh backscattering in WDM-PONs by using Coded RZ modulation
Author_Institution :
Dept. of Electron. & Commun. Eng., Khulna Univ. of Eng. & Technol., Khulna, Bangladesh
Abstract :
Rayleigh backscattering (RB) noise is a fundamental limitation for a centralized loopback WDM-PONs based on RSOA in ONU side. By exploring the RSOA chirp induced spectral boarding with DC-balanced line coding, here a novel modulation format called as Coded RZ is proposed to enhance the system tolerance against RB. The results showed that the signal-to-noise (SCR) is improved by about 8 dB and 2.5 dB from the conventional NRZ and RZ modulation formats respectively to maintain the power penalty ≤ 2dB.
Keywords :
modulation coding; optical modulation; passive optical networks; semiconductor optical amplifiers; wavelength division multiplexing; DC-balanced line coding; NRZ modulation; ONU; RSOA; RSOA chirp; Rayleigh backscattering noise; SCR; centralized loopback WDM-PON; coded RZ modulation; power penalty; signal to noise; spectral boarding; tolerance enhancement; Crosstalk; Modulation; Noise; Optical attenuators; Optical crosstalk; Optical filters; Optical signal processing; Passive Optical Networks; Rayleigh Backscattering Noise; Reflective Semiconductor Optical Amplifier;
Conference_Titel :
Electrical Information and Communication Technology (EICT), 2013 International Conference on
Conference_Location :
Khulna
Print_ISBN :
978-1-4799-2297-0
DOI :
10.1109/EICT.2014.6777847
