D. D. Starykh, L. A. Samodelkin, O. E. Nanii, V. N. Treshchikov
- T8 NTC LLC
- Faculty of Physics, Lomonosov Moscow State University
Abstract: A technique for measuring interchannel distortions that occur in fibre-optic communication lines with QAM/CD and IM/DD channels is proposed, and a method for describing distortions in the form of additive noise is presented. On the basis of the proposed technique, measurements are performed in a wide range of conditions and an empirical model is formed to assess the deterioration of the quality of a coherent signal due to the influence of IM/DD channels.
Keywords: distributed Raman amplifier, co-current Raman pumping, coherent communication system, nonlinear interchannel interaction, phase cross-modulation, interference noise.
Received: 13.07.2022
Revised: 30.09.2022
Accepted: 30.09.2022