Title :
Nonlinear transmission performance of digital Nyquist WDM and optical OFDM
Author :
Bayvel, Polina ; Kilmurray, Sean ; Killey, Robert I.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. Coll. London, London, UK
Abstract :
A key question for tomorrow´s transmission systems is which modulation format should be used for optimal transmission performance? Much recent work has focused on the comparison of Nyquist-WDM and orthogonal frequency division multiplexing techniques to maximise spectral efficiency. In this paper, we compare digital quasi-Nyquist WDM and reduced-guard-interval optical OFDM signal formats, in terms of their tolerance to fibre nonlinearity in long-haul spectrally-efficient transmission. Using computer simulations and closed-form analytical expressions for four-wave-mixing induced noise, the maximum transmission distances achievable with QPSK, QAM-8 and QAM-16 formats were calculated for links employing standard single mode fibre (SSMF) and ultra large area fibre (ULAF). Interestingly, these studies predict similar performance, in terms of achievable transmission performance, with digital quasi-Nyquist WDM and RGI-OFDM.
Keywords :
OFDM modulation; multiwave mixing; optical modulation; wavelength division multiplexing; QAM-16 format; QAM-8 format; QPSK; digital quasiNyquist WDM; four-wave-mixing induced noise; nonlinear transmission system; orthogonal frequency division multiplexing techniques; reduced-guard-interval optical OFDM signal formats; standard single mode fibre; ultra large area fibre; Fiber nonlinear optics; Integrated optics; OFDM; Optical fibers; Optical filters; Wavelength division multiplexing; Nyquist WDM; high spectral efficiency; optical OFDM; optical transmission;
Conference_Titel :
Transparent Optical Networks (ICTON), 2012 14th International Conference on
Conference_Location :
Coventry
Print_ISBN :
978-1-4673-2228-7
Electronic_ISBN :
2161-2056
DOI :
10.1109/ICTON.2012.6254414
