Guiding 2.94 $ \mu $m using low-loss microstructured antiresonant triangular-core fibers

TL;DR

This paper presents a novel hollow-core microstructured fiber with a triangular core designed for efficient mid-infrared light guidance at 2.94 μm, achieving low loss and dispersion for potential applications in mid-IR photonics.

Contribution

The paper introduces a simple, anti-resonant hollow-core fiber design with a triangular core optimized for mid-IR guidance, demonstrating low loss and dispersion at 2.94 μm.

Findings

Minimum transmission loss of 0.08 dB/m at 2.94 μm

Dispersion of 2.3 ps/km/nm at 2.94 μm

Effective guiding of mid-infrared light using the new fiber design

Abstract

We introduce a new simple design of hollow-core microstructured fiber targeted to guide mid-infrared light at a wavelength 2.94 $ \mu $m. The fiber has a triangular-core supported via silica-glass webs enclosed by a large hollow capillary tube. The fiber specific dimensions are determined based on the guiding technique, which is based on the anti-resonant mechanism. For a triangular-core with side length $100$ $ \mu $m, the fiber has a minimum transmission loss $0.08\pm0.005$ dB/m and dispersion 2.3 ps/km/nm at the operational wavelength 2.94 $ \mu $m.