V. A. Konyshev, A. V. Leonov, O. E. Nanii, A. G. Novikov, I. I. Shikhaliev, V. N. Treshchikov, R. R. Ubaydullaev, “Optical signal quality improvement due to nonlinear interaction between spectral channels”, Kvantovaya Elektronika, 2016, Volume 46, Number 10,Pages <nobr>924

Fibreoptic devices

Optical signal quality improvement due to nonlinear interaction between spectral channels

V. A. Konyshev^ab, A. V. Leonov^b, O. E. Nanii^cb, A. G. Novikov^b, I. I. Shikhaliev^b, V. N. Treshchikov^db, R. R. Ubaydullaev^b

^a Institute for the History of Science and Technology named after S. I. Vavilov RAS, Moscow
^b "T8" LLC, Moscow
^c Lomonosov Moscow State University, Faculty of Physics
^d Kotelnikov Institute of Radioengineering and Electronics, Fryazino Branch, Russian Academy of Sciences

Abstract: This paper examines stimulated Brillouin scattering (SBS) suppression in multichannel DWDM systems owing to nonlinear cross interaction between the channels and its effect on optical signal quality (1/OSNR_R) in a communication link. We present an experimental study of single-, three- and five-channel systems with 10 Gbit s^-1 NRZ channels. The optical signal quality in the three- and five-channel systems is shown to be better than that in the single-channel system. The reason for this is that cross-phase modulation broadens the spectrum of the signal and raises the SBS threshold. This in turn ensures a more pronounced optical signal quality improvement due to self-phase modulation.

Keywords: multichannel DWDM systems, nonlinear interaction between channels, optical signal quality, cross-phase modulation, self-phase modulation.

Received: 09.02.2016
Revised: 25.08.2016