title: Experimental demonstration of a cost-effective bit rate variable IM/DD optical OFDM with reduced guard band.
abstract: We experimentally demonstrate an intensity modulated and direct detection optical OFDM with variable bit rate from 5 Gb/s to 9 Gb/s using BPSK format. A fast processing based on the Hartley transform is performed with low complexity DSP, achieving the same performance as 4QAM FFT-based processing. Using the same bandwidth occupancy as required for 5 Gb/s, the bit rate can be increased up to 80% and transmitted over 25 km SSMF, by reducing the guard band and adopting an optimized transceiver design with additional overhead, including half-length training symbols and cyclic extension.
authors.affiliation: Centre Tecnològic de Telecomunicacions de Catalunya, 08860 Castelldefels, Barcelona, Spain. michela.svaluto@cttc.es
authors.forename: Michela Svaluto
authors.initials: MS
authors.lastname: Moreolo
authors.forename: Josep M
authors.initials: JM
authors.lastname: Fàbrega
authors.forename: Fco Javier
authors.initials: FJ
authors.lastname: Vílchez
authors.forename: Laia
authors.initials: L
authors.lastname: Nadal
authors.forename: Gabriel
authors.initials: G
authors.lastname: Junyent