Title :
Phase-Modulation-Based Loopback Scheme for Rayleigh Noise Suppression in 10-Gb/s Carrier-Distributed WDM-PONs
Author :
Xu, Jing ; Chen, Lian-Kuan ; Chan, Chun-Kit
Author_Institution :
Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Shatin, China
Abstract :
We propose a novel scheme to suppress Rayleigh noise in carrier-distributed wavelength-division-multiplexed passive optical networks, by using differential phase-shift keying (DPSK) as the upstream modulation format. Due to the narrow spectrum of the distributed carrier, the Rayleigh noise towards the optical line terminal (OLT) also has narrow spectrum and can be effectively suppressed by the notch filter-like destructive port of the delay-interferometer at the OLT, which is used to demodulate the upstream DPSK signal simultaneously. Experimental demonstration of the 10-Gb/s upstream signal is achieved with less than 0.2-dB power penalty induced by Rayleigh noise after the transmission of 20-km single-mode fiber.
Keywords :
light interferometers; noise abatement; optical fibre networks; optical modulation; phase shift keying; wavelength division multiplexing; Rayleigh noise suppression; bit rate 10 Gbit/s; carrier distributed WDM-PON; carrier distributed wavelength division multiplexed passive optical networks; delay interferometer; differential phase shift keying; distance 20 km; loopback scheme; notch filter like destructive port; phase modulation; single mode fiber; Differential quadrature phase shift keying; Optical crosstalk; Optical filters; Optical interferometry; Optical modulation; Optical network units; Optical noise; Optical receivers; Passive optical networks; Phase noise; Differential phase-shift keying (DPSK); Rayleigh noise; wavelength-division-multiplexed passive optical network (WDM-PON);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2055844
