Abstract
Future metropolitan optical networks face the challenge of having signals with different modulation formats and different bit rates coexisting in the network. The interference between those signals, and mainly from signals at the same wavelength, named in-band crosstalk, may lead to severe network performance degradation. In this work, the performance of 40 Gb/s DQPSK optical receivers impaired by in-band crosstalk due to mixed modulation formats and multiple line rates is assessed. It is shown that the most severe performance degradation due to in-band crosstalk is caused by 10 Gb/s interferers, being the OOK interferer the most detrimental to the network performance. We show also that the reduction of the duty-cycle of the interferers increases the DQPSK optical receiver tolerance to in-band crosstalk.
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Acknowledgments
This work was supported by Instituto de Telecomunicações of Portugal within the project IXOS3D—PEst-OE/EEI/LA0008/2011.
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Rebola, J.L., Cancela, L.G.C., Pires, J.J.O. (2016). DQPSK Optical Networks Impaired by Multi Line Rates and Mixed Modulation Formats Interferers. 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_2
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DOI: https://doi.org/10.1007/978-3-319-27321-1_2
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