Abstract
The next generation optical systems will use OFDM modulation. It requires highly linear transmitter or the signal will be distorted. However, the commonly used optical Mach-Zehnder Modulator characteristic is not linear. In this paper we examined the modulator caused signal distortions and its possible driving methods to minimize the signal degradation. We will show that the distortions can be eliminated with proper driving technique and it is not necessary to use a dedicate hardware to compensate the effect of nonlinearity. The dispersions and the nonlinearities of the optical fibers (e.g. polarization mode dispersion, four wave mixing) are investigated too. A simple method is presented which can reduce the polarization mode dispersion. The transmitter and the channel caused distortions are compared to each other. The results show that some distortions from the transmitter and some from the channel are not only in the same range, but their effect to the signal is also similar.
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© 2016 Springer International Publishing Switzerland
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Fekete, G., Berceli, T. (2016). Distortions and Their Effect on Signal Transmission in Coherent-OFDM Systems. In: Ribeiro, P., Raposo, M. (eds) Photoptics 2014. Springer Proceedings in Physics, vol 177. Springer, Cham. https://doi.org/10.1007/978-3-319-27321-1_1
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DOI: https://doi.org/10.1007/978-3-319-27321-1_1
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Publisher Name: Springer, Cham
Print ISBN: 978-3-319-27319-8
Online ISBN: 978-3-319-27321-1
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