Cladding-Engineered Hollow-Core Fiber for Polarization Control and Optical Sensing Applications

Abstract

A polarization-selective hollow-core antiresonant fiber (HC-ARF) is proposed and numerically investigated for single-polarization guidance in the telecom band. Finite-element simulations across the 1.50–1.60 μm range show that the optimized design achieves a high polarization extinction ratio of 1.73×104 at 1.55 μm, with low loss for the y–polarized mode (0.72 dB/km) and strongly suppressed x–polarized loss (12531 dB/km). The fiber also provides a modal birefringence of 0.21×10−4, enabling strong polarization selectivity and stable single-polarization guidance. These results indicate that the proposed PM-HC-ARF is well-suited for polarization-sensitive applications such as interferometry, sensing, and coherent communication.

Md Selim Habib

Assistant Professor of Electrical Engineering

Hollow-core fibers; Fiber sensors; Ultrafast nonlinear optics