研究目的
To evaluate the signal-to-cross talk ratio (SXR) of cross talk induced by stimulated Raman scattering (SRS) in wavelength-division-multiplexing-based radio-over-fiber links, and to test the performance of different optical fibers in mitigating this cross talk.
研究成果
SXR decreases with increases in channel input power and transmission distance, and increases with increases in fiber effective area and modulation frequency. Standard SMF fiber provides the highest SXR, outperforming Corning LEAF and Alcatel TeraLight by 3 dBm and 6 dBm respectively, due to its larger effective area and higher dispersion. System performance can be optimized by setting modulation frequency to 2 GHz, input power between 10-20 mW, and fiber effective area between 65-85 μm2.
研究不足
The study is simulation-based, not experimental; it may not account for all real-world variations and nonlinear effects. Specific equipment models and brands for power meters and spectrum analyzers are not detailed, limiting reproducibility.
1：Experimental Design and Method Selection:
A theoretical model was derived for SXR calculation, and simulations were conducted using MATLAB and OptSim to analyze the effects of various parameters on SXR and to evaluate fiber performance.
2：Sample Selection and Data Sources:
Simulations were based on a 16-channel WDM RoF system with specific parameters (e.g., wavelengths, power levels, fiber types).
3：List of Experimental Equipment and Materials:
Standard SMF, Corning LEAF, Alcatel TeraLight fibers; MATLAB and OptSim software; optical power meters and optical spectrum analyzers (mentioned but not specified).
4：Experimental Procedures and Operational Workflow:
Designed a simulation model in OptSim for a 16-channel system, varied parameters (modulation frequency, optical power, transmission length, fiber effective area, walk-off parameter), and used MATLAB for numerical simulations of the derived SXR expression.
5：Data Analysis Methods:
Numerical simulation in MATLAB to compute SXR, and OptSim simulations to observe received power and SXR variations; results were analyzed graphically.
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