Experimental investigation on DVB-T over CATV-RoF constraints in long haul Passive Optical Networks
Transparent Optical Networks（2014）
Abstract
The future installation of FTTB infrastructures could totally change the broadcasting television market thanks to the introduction of a wavelength channel dedicated to CATV Radio over Fibre (RoF). In this paper we report an experimental investigation on the optical transmission of the Italian digital terrestrial broadcast television (DVB-T) signal in Passive Optical Network (PON), analyzing the impact of the TV spectrum characteristics on the optical transmission and achieving transmission distances up to 40 km in G.652 links, upgradable to > 60 km. The investigation was carried out by adopting a Lithium Niobate (LiNbO3) Mach-Zehnder (MZ) modulator. Various critical points are examined, especially regarding on Harmonic, Intermodulation and Cross-modulation Distortions (HD, IMD, X-MOD) due to intrinsic nonlinear Power-Voltage (P-V) response of Mach-Zehnder modulator.
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Key words
cable television,digital video broadcasting,harmonic distortion,intermodulation distortion,light transmission,lithium compounds,passive optical networks,radio-over-fibre,catv radio over fibre,catv-rof constraints,dvb-t,fttb infrastructures,g.652 links,italian digital terrestrial broadcast television,linbo3,mach-zehnder modulator,tv spectrum characteristics,broadcasting television market,cross-modulation distortions,harmonic distortions,intermodulation distortions,intrinsic nonlinear power-voltage response,lithium niobate,long haul passive optical networks,optical transmission,wavelength channel,mach-zehnder ac driving,mach-zehnder dc bias,mach-zehnder nonlinearity,modulation,mach zehnder modulator,optical fibers,radio frequency
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