An Algorithm to Speed up the Spatial Power Profile Calculation in Backward Raman Amplified Systems

TL;DR

This paper introduces a novel algorithm that significantly accelerates the calculation of power profiles in backward Raman amplified systems, enabling real-time optimization for ultra-wide band optical transmission.

Contribution

The paper presents a matrix-based integral approximation method that speeds up power profile calculations by up to thirty times while maintaining high accuracy.

Findings

Achieves up to 30-fold speed increase over traditional methods

Maintains error margin under 0.05 dBm

Facilitates real-time optimization in UWB optical systems

Abstract

As data transmission demands grow, long-haul optical transmission links face increasing pressure to increase their throughput. Expanding usable bandwidth through Ultra-Wide Band (UWB) systems has become the primary strategy for increasing transmission capacity. However, UWB systems present challenges, such as the reliance on backward Raman amplification and the complications posed by inter-channel stimulated Raman scattering (ISRS), which causes uneven signal propagation across bands. To address these issues, accurate and efficient physical models are required for real-time optimization, which rely on the knowledge of the power profile. This paper develops a novel, more efficient method for computing the power profile of signals and pumps, utilizing the integral form of the equations with matrix-based approximations. The algorithm achieves up to a thirty-fold average speed increase over conventional approaches while maintaining an error margin under 0.05 dBm. These results represent a significant step forward towards reducing optimization times and enabling more extensive studies in ultra-wide band long haul optical transmission, further facilitating research and commercialization of UWB systems, in an effort to address the growing demand for higher throughput.