Design of hollow core anti-resonant fiber for green pulse laser transmission

Abstract This paper presents a systematic optimization and analysis of a hollow-core anti-resonant fiber designed for 515 nm green pulsed laser delivery. Building upon an established structural framework, we integrated surface scattering loss and chromatic dispersion into a multi-objective optimization using response surface methodology. The optimized fiber demonstrates low attenuation and near-zero dispersion. Furthermore, we investigated macroscopic bending characteristics to enhance single-mode performance through mode filtering. Numerical results indicate that a coiling radius of 7.5 cm effectively suppresses higher-order modes, maintaining a fundamental mode loss of 2.5 dB km −1 while achieving a high-order mode extinction ratio of 443.04. Finally, comprehensive analyses of fabrication tolerances—including cladding ellipticity and plate deformations—confirm the design’s robustness, validating its suitability for high-stability precision laser applications.