研究目的
To design and analyze a dual hollow-core antiresonant fiber (DHC-ARF) acting as a polarization fiber coupler, focusing on its coupling parameters and performance.
研究成果
The research successfully designed a DHC-ARF with optimized coupling parameters for polarization splitting, achieving a coupling length ratio of ~2 for x- and y-polarized signals and optical losses below 0.3 dB/cm. The study highlighted the importance of structural symmetry and core proximity in achieving efficient coupling and suggested further optimization for improved performance.
研究不足
The study identified that the coupling strength was weak for both polarizations in the initial asymmetrical structure, and the higher order mode extinction ratio (HOMER) was calculated to be 28 at 1550 nm, indicating potential limitations in single-mode performance. The fabrication of the proposed structure was also noted as a challenge.
1：Experimental Design and Method Selection:
The study utilized numerical modeling and simulation to design and analyze the DHC-ARF. The Lumerical Mode Solutions commercial software was used for simulations, including the bidirectional eigenmode expansion (EME) solver for propagation analysis.
2：Sample Selection and Data Sources:
The research focused on three versions of DHC-ARF with different structural perturbations to study their coupling properties.
3：List of Experimental Equipment and Materials:
The simulations were conducted using the Palik model material library for SiO2 dispersion.
4：Experimental Procedures and Operational Workflow:
The study involved designing symmetrical and asymmetrical DHC-ARF structures, analyzing their coupling length ratio (CLR), loss, and coupling strength through numerical simulations.
5：Data Analysis Methods:
The analysis included calculating the power fraction confined in the glass components, coupling strength, and extinction ratio to evaluate the DHC-ARF's performance as a polarization splitter.
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