Modeling and analysis of the coupling effect for large-scale multi-band optical networks.

Area of Science:

• Optical Network Engineering
• Nonlinear Optics
• Network Layer Analysis

Background:

• Stimulated Raman scattering (SRS) is a significant bottleneck in multi-band optical networks, causing inter-channel signal power transfer.
• Existing research primarily focuses on the physical layer impact of SRS, with network-layer investigations being challenging due to dynamic network parameters.

Purpose of the Study:

• To introduce a novel 'coupling effect' perspective for analyzing SRS impact at the network layer.
• To develop a Flow Coupling Network (FCN) model to quantify SRS-induced coupling effects.
• To propose metrics for flow coupling strength and network coupling strength.

Main Methods:

• Construction of a directed weighted network (Flow Coupling Network - FCN).
• Proposal and application of flow coupling strength and network coupling strength metrics.
• Optimization of flow launch power based on flow coupling strength and analysis across different network topologies (WS, BA, ER).

Main Results:

• Flow coupling strength-based power optimization yields greater network capacity gains than frequency optimization.
• Higher network capacity gains are achievable through power optimization under stronger network coupling.
• Network coupling strength increases with network scale in WS small-world networks.

Conclusions:

• The coupling effect is a critical factor for analyzing SRS at the network layer.
• The FCN model and proposed metrics provide a robust framework for understanding and mitigating SRS impact.
• Network topology influences the effectiveness of power optimization strategies for SRS management.