MicroStructure Element Method (MSEM): viscous flow model for the virtual draw of microstructured optical fibers.

Area of Science:

• Materials Science
• Optical Engineering
• Computational Modeling

Background:

• Microstructured optical fibers (MOFs) are crucial for advanced photonic applications.
• Accurate modeling of MOF structural evolution during the drawing process is challenging.
• Existing models often lack the capability to predict complex structural changes in high air-filling fraction MOFs.

Purpose of the Study:

• To introduce a novel computational method for simulating the structural evolution of MOFs during fiber drawing.
• To provide an accurate prediction of final fiber dimensions and cross-sectional distortions.
• To enable efficient exploration of drawing parameters, reducing the need for empirical testing.

Main Methods:

• An extension of the Discrete Element Method (DEM) is employed.
• The method models forces on microstructure nodes to update positions in the neck-down region.
• The simulation progresses until the fiber reaches a final frozen state.

Main Results:

• The model accurately predicts the final dimensions and cross-sectional distortions of Hollow Core Photonic Band Gap Fibers (HC-PBGFs).
• Simulations of six different HC-PBGFs validated the model's predictive capabilities.
• The method demonstrates superior performance compared to existing state-of-the-art models.

Conclusions:

• The proposed DEM-based method offers a highly accurate and efficient tool for modeling MOF drawing.
• This approach significantly accelerates the design and optimization process for MOFs.
• It eliminates the requirement for expensive and time-consuming empirical parameter scans in MOF manufacturing.