Efficient full-vectorial modal analysis based on immersed interface method for dielectric chiral optical fibers

Area of Science:

• Optics and Photonics
• Computational Electromagnetics
• Materials Science

Background:

• Modal analysis is crucial for understanding light propagation in optical fibers.
• Chiral optical fibers exhibit unique electromagnetic properties due to their structure.
• Efficient numerical methods are needed for complex fiber geometries.

Purpose of the Study:

• To develop and validate an efficient immersed interface method for modal analysis of dielectric chiral optical fibers.
• To apply the method for computing guided, leaky, and surface modes.
• To demonstrate the method's applicability to arbitrary electromagnetic parameter profiles.

Main Methods:

• Application of the immersed interface method within a finite-difference framework.
• Development of second- and fourth-order accuracy formulations.
• Numerical computation of various modes in dielectric chiral fibers.

Main Results:

• The developed formulations accurately compute guided, leaky, and surface modes.
• The method is effective for dielectric chiral step-profile and Bragg fibers.
• The approach is applicable to arbitrary, piecewise constant electromagnetic parameter profiles.

Conclusions:

• The immersed interface method provides an efficient and accurate approach for modal analysis of dielectric chiral optical fibers.
• The developed finite-difference formulations are versatile for different mode types and fiber profiles.
• This work contributes to the understanding and design of advanced optical fiber structures.