研究目的
To present a novel dispersions equalization technique for multilayer core four-mode fiber using LP mode-matrix method, optimizing core ring radius to achieve equalized modal dispersion.
研究成果
The study successfully demonstrated a new and simple approach to equalize modal dispersion by varying the dimensional parameters of the core index profiles. The optimized thickness values for the core rings were determined, achieving equalized modal dispersion at the operating wavelength of 1.55 μm. The proposed FMF can be a potential medium for MDM systems due to its high dispersion tolerance.
研究不足
The fabrication process requires tight control of the rings radius to prevent shifting the equalization away from the operating wavelength (1.55μm). The dispersion sensitivity to thickness variation is a limitation.
1：Experimental Design and Method Selection:
The study employed an LP mode matrix method for dispersion calculations due to its accuracy over the finite difference method. The core ring radius was varied to determine the optimized thickness for dispersion equalization.
2：Sample Selection and Data Sources:
The study focused on two types of fiber cross-section structures: center high-index core fiber (CH-ICF) and center low-index core fiber (CL-ICF).
3：List of Experimental Equipment and Materials:
A commercial OptiFiber numerical software package was used for simulations.
4：Experimental Procedures and Operational Workflow:
The optimization was treated in two stages; adjusting the thicknesses of the core rings until modal dispersions are equalized, and investigating the effects of varying thickness on the effective area of the modes.
5：Data Analysis Methods:
The LP mode matrix method was used to calculate the dispersion of the modes.
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