Morant Maria, Llorente Roberto, Hauden Jerome, Quinlan Terence, Mottet Alexandre, Walker Stuart
Nanophotonics Technology Centre, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain.
Opt Express. 2011 Dec 12;19(26):B450-6. doi: 10.1364/OE.19.00B452.
A dual-drive LiNbO(3) architecture modulator with chirp management is proposed and developed offering SFDR > 25 dB in a 1.4 V bias excursion compared to only 0.5 V bias excursion in a conventional Mach-Zehnder electro-optical modulator (MZ-EOM). The architecture effectively extends the linear regime and enables the optical transmission of wireless systems employing orthogonal division multiplexing (OFDM) modulation such as ultra-wide band (UWB) which require high linearity over a broad frequency range due to their high peak-to-average power ratio (PARP). Radio-over-fiber UWB transmission in a passive optical network is experimentally demonstrated employing this technique, exhibiting an enhancement of 2.2 dB in EVM after 57 km SSMF when the dual-drive developed modulator is employed.
