研究目的
Designing and manufacturing a new type of silica graded index laser-optimized multimode optical fibers (LOMF) with an extremely enlarged core diameter up to 100 μm for harsh environment Gigabit onboard cable systems and industrial networks.
研究成果
The study successfully designed and manufactured a new type of LOMF with a 100-μm core diameter, demonstrating good bandwidth potentiality for applications in short-range onboard and industrial multi-Gigabit network cable systems. The optical fiber showed minimal attenuation and DMD distortions under tested conditions, supporting laser-based 1 Gbps bit rate data transmission over a 520 m link.
研究不足
The study focused on a specific type of optical fiber (LOMF 100/125) and its performance under certain conditions (harsh environment Gigabit onboard cable systems and industrial networks). The research did not explore the fiber's performance in other environments or with different core diameters.
1：Experimental Design and Method Selection:
The study involved designing a special optimized graded refractive index profile for LOMF with a 100-μm core diameter to provide low differential mode delay (DMD) for selected guided modes. The methodology included scaling up a reference LOMF 50/125 refractive index profile to 100-μm core diameter and optimizing it for DMD reduction.
2：Sample Selection and Data Sources:
A pilot 520 m length of the designed LOMF 100/125 was manufactured and tested. The optical fiber preform was manufactured by FCVD (Flame Chemical Vapor Deposition) technique.
3：List of Experimental Equipment and Materials:
The study utilized a DMD analyzer workstation lab kit R2D2 for DMD map measurement, according to ratified standards TIA-455-220-A/FOTP-220 and IEC 60793-2-
4：Experimental Procedures and Operational Workflow:
The experimental setup included a Fabry–Perot LD generating quasi-Gaussian optical pulses at wavelength λ = 1310 nm, launched into the MMF via a single-mode pigtail under precision offset conditions. Measurements included geometry properties, attenuation, and DMD map.
5：Data Analysis Methods:
The study analyzed the DMD map and estimated pulse dispersion in relation to initial FWHM. The results were compared with estimated acceptable dispersion values for 1000Base-LX and 10GBase-LX specifications.
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