研究目的
Investigating the statistical behavior of the intercore crosstalk (ICXT) power in weakly coupled multicore fibers (MCFs) with multiple interfering cores.
研究成果
The ICXT power induced by multiple interfering cores can be suitably modeled by a χ2 distribution with four degrees of freedom, indicating that the ICXT contributions induced by different cores are uncorrelated. This provides useful tools for the performance optimization of MCF-based networks with high core density.
研究不足
The study focuses on weakly coupled multicore fibers with specific configurations and may not be directly applicable to other types of fibers or coupling conditions.
1：Experimental Design and Method Selection:
The study involves assessing the histograms of ICXT power with multiple interfering cores and comparing them with the probability density function (pdf) of the quadratic form corresponding to the ICXT power. Different correlation coefficients between the in-phase and quadrature Gaussian ICXT field components are considered.
2：Sample Selection and Data Sources:
The experimental setup includes a 20 km-long trench-assisted 19-core fiber. The ICXT power is measured at the output of the central core using a power meter.
3：List of Experimental Equipment and Materials:
External cavity laser (HP8168F), optical amplifier, power meter, and a 20 km-long trench-assisted 19-core fiber.
4：Experimental Procedures and Operational Workflow:
The laser's optical power is injected into the cores adjacent to the central core. The ICXT power is measured over periods of more than six days with time intervals of 2 seconds.
5：Data Analysis Methods:
The histogram of the ICXT power is compared with the χ2 distribution with four degrees of freedom and the numerical PDF of the quadratic form with several nonzero correlation coefficients.
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