Signaling on the Continuous Spectrum of Nonlinear Optical fiber
This work addresses the challenge of improving data rate and reach in nonlinear optical fiber communications for the telecommunications industry.
The paper proposes and analyzes three signaling techniques for the continuous spectrum of nonlinear optical fiber, demonstrating a reach distance of 7100 km at 9.6 Gbps by optimizing bandwidth and guard intervals.
This paper studies different signaling techniques on the continuous spectrum (CS) of nonlinear optical fiber defined by nonlinear Fourier transform. Three different signaling techniques are proposed and analyzed based on the statistics of the noise added to CS after propagation along the nonlinear optical fiber. The proposed methods are compared in terms of error performance, distance reach, and complexity. Furthermore, the effect of chromatic dispersion on the data rate and noise in nonlinear spectral domain is investigated. It is demonstrated that, for a given sequence of CS symbols, an optimal bandwidth (or symbol rate) can be determined so that the temporal duration of the propagated signal at the end of the fiber is minimized. In effect, the required guard interval between the subsequently transmitted data packets in time is minimized and the effective data rate is significantly enhanced. Moreover, by selecting the proper signaling method and design criteria a reach distance of 7100 km is reported by only singling on the CS at a rate of 9.6 Gbps.