Maximum transmission reach for optical signals in elastic optical networks employing band division multiplexing

Abstract

Multi-band transmission systems have emerged as a potential answer to the limited capacity of silica based optical fiber. It is based on utilizing the complete low-loss region of optical fibers. Additionally, elastic optical networks (EON) were proposed to efficiently manage limited resources in optical networks. The selection of route, modulation format and spectrum is the main problem that requires solving to operate an EON. Understanding how linear and nonlinear impairments accumulate during propagation in an optical fiber link is essential to solve this problem. Here we preset a study on the maximum reach optical signals can propagate in a multi-band environment for a variety of modulation formats with commonly used bit error rate threshold values in EON.

Heuristic Approaches for Dynamic Provisioning in Multi-Band Elastic Optical Networks

“…Following the methodology from [10], the worst-case optical reach of the scenarios described was calculated considering four modulation formats. For each configuration, the signal-to-noise ratio (SNR) was computed for every FSU at optimum signal power using the Interchannel Stimulated Raman Scattering Gaussian Noise (ISRS GN) model and assuming dual polarization (DP) signals [11].…”

“…As the number of bands increases, nonlinear interactions due to SRS reduce the maximum transmission reach. The number of frequency slots, f src,dst , required by a connection request defined by the triplet (src, dst, b) is given by f src,dst = ⌈ b /F SUm⌉, where src and dst are the source and destination nodes of the connection request, respectively; b is the requested bitrate, and F SU m is the bitrate achieved by a frequency slot unit for a given modulation format, m. F SU m is equal to those reported in Table 3 in [10]: 23, 46, 69 and 92 Gbps for DP BPSK, DP QPSK, DP 8-QAM, and DP 16-QAM, respectively.…”

Análise do Impacto de Penalidades Físicas na Banda C para uma Rede Óptica Elástica

“…Alguns consideram o ruído de emissão espontânea amplificada (ASE -Amplified Spontaneous Emission) e as interferências não lineares dependentes do comprimento de onda [7]- [12]. Outros ainda consideram a abordagem do alcance máximo obtido para cada formato de modulação [13]- [16].…”

“…Uzunidis et al [11] desenvolveram uma ferramenta de planejamento que envolve um algoritmo de roteamento, atribuição de formato de modulação e espectro. Foram considerados o ruído ASE, a mistura de quatro ondas e o SRS nas bandas O, S, C e L. Em [12], Sadeghi et al propuseram diferentes algoritmos de alocação de nós translúcidos com o objetivo de minimizar o consumo de energia nas bandas de transmissão S, C, L e U. Paz et al [13] fizeram um estudo sobre o alcance máximo da propagação dos sinais ópticos em um ambiente multibanda para uma variedade de formatos de modulação com valores de taxa de erro por bit comumente usados em EONs. Calderón et al [14] propuseram três algoritmos para atribuição de bandas de transmissão, considerando as bandas E, S, C e L. Morales et al [15] propuseram um esquema, baseado em aprendizagem por reforço, para resolver o problema do roteamento, atribuição de banda de transmissão, formato de modulação e espectro, considerando as bandas E, S, C e L. Sheik et al [16] propuseram um esquema de provisionamento de recursos baseado em aprendizagem profunda por reforço, considerando as bandas E, S, C e L.…”

Dynamic resource allocation in different ultrawideband optical network topologies

“…For each transmission band, a conservative maximum transmission reach was computed for DP-BPSK, DP-QPSK, DP-8QAM and DP-16QAM following the methodology from [6]. A constant input power across the optical spectrum was assumed and the ISRS GN-model [7] was used to include nonlinear distortions generated in the ultrawideband regime.…”