Vertical-Cavity Surface-Emitting Lasers (VCSELs) operating at 850 nm offer cost-effective optical solutions for various applications, including RF signal transmission in Radio-over-Fiber (RoF) systems. This paper presents preliminary results from a numerical investigation aimed at optimizing VCSEL-to-Standard Single-Mode Fiber (SSMF) coupling to improve signal transmission efficiency. The study, which is performed using COMSOL Multiphysics and MATLAB, evaluates optical power coupling efficiency and identifies optimal parameters for butt-coupling. Key parameters such as air-gap distance, angles, and misalignment between VCSEL and fiber are analyzed, revealing how they affect fiber mode distribution and coupling efficiency. These findings provide strategies for mitigating coupling inefficiencies and improving RoF system performance, particularly in 5G and future networks.
Esfahani, M.N., Nanni, J., Tartarini, G. (2025). Optimizing VCSEL-to-SSMF Butt-Coupling in view of Enhanced Efficiency in Radio-over-Fiber Systems. New York : IEEE Computer Society [10.1109/icton67126.2025.11125372].
Optimizing VCSEL-to-SSMF Butt-Coupling in view of Enhanced Efficiency in Radio-over-Fiber Systems
Esfahani, Maryam Nasr;Nanni, Jacopo;Tartarini, Giovanni
2025
Abstract
Vertical-Cavity Surface-Emitting Lasers (VCSELs) operating at 850 nm offer cost-effective optical solutions for various applications, including RF signal transmission in Radio-over-Fiber (RoF) systems. This paper presents preliminary results from a numerical investigation aimed at optimizing VCSEL-to-Standard Single-Mode Fiber (SSMF) coupling to improve signal transmission efficiency. The study, which is performed using COMSOL Multiphysics and MATLAB, evaluates optical power coupling efficiency and identifies optimal parameters for butt-coupling. Key parameters such as air-gap distance, angles, and misalignment between VCSEL and fiber are analyzed, revealing how they affect fiber mode distribution and coupling efficiency. These findings provide strategies for mitigating coupling inefficiencies and improving RoF system performance, particularly in 5G and future networks.| File | Dimensione | Formato | |
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