Abstract
By using the carrier-suppressed single-sideband (CS-SSB) modulation, the Rayleigh backscattering (RB) experienced by the uplink signal can be effectively mitigated due to the reduction of the spectral overlap between the uplink signal and the distributed optical carrier. In this work, we first introduce the theoretical analysis of the CS-SSB generation using the dual-drive MZM (DD-MZM)-based and a dual-parallel MZM (DP-MZM)-based optical networking units (ONUs). Due to the different modulation mechanisms of the two CS-SSB modulations, the frequency components of the generated CS-SSB signals are also different. The transmission performance and the dispersion tolerance of the uplink signals generated by the two CS-SSB modulators are also analyzed and discussed.
Highlights
Owing to the cost-effectiveness, passive optical network (PON) is emerging as a promising access network architecture to cope with the fast-growing bandwidth demand by end-users
Both kinds of modulators can produce the carrier suppressed-single sideband (CS-SSB) uplink signals, we found that the frequency components of the generated CS-SSB signals are different due to the different modulation mechanisms
We first introduce the theoretical analysis of CS-SSB carrier generations using the dual-drive Mach-Zehnder modulator (DD-MZM)-based and the dual-parallel MZM (DP-MZM)-based optical networking units (ONUs)
Summary
Owing to the cost-effectiveness, passive optical network (PON) is emerging as a promising access network architecture to cope with the fast-growing bandwidth demand by end-users. Results show that the CS-SSB signal generated by the DP-MZM has better transmission performance Based on these results, an experiment WDM-LR-PON using carrier distribution with DP-MZM-based ONU is implemented and evaluated. For CS-SSB MOD1 as shown in inset (i) of Fig. 2, the DD-MZM was driven in-phase and quadrature-phase by an electrical sinusoidal signal at frequency fs (10 GHz) generated by a radio frequency (RF) signal synthesizer. For the CS-SSB MOD2 as shown in inset (ii) of Fig. 2, the baseband 2.5 Gb/s NRZ data at PRBS 231-1 was first upconverted via a RF mixer with an electrical sinusoidal signal at frequency fs (10 GHz) generated by a RF signal synthesizer. For the case of CS-SSB MOD1, a shared DD-MZM (MODa) could be located at the remote node [12] to simplify each ONU; active components, such as electrical power supply and high speed (~10 GHz) diving circuit are required at the remote node
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