Low-loss asymptotically single-mode propagation in large-core OmniGuide fibers

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Traditional optical fibers face limitations in core size and material-dependent losses.
• OmniGuide fibers offer an alternative light-guiding mechanism using omnidirectional reflection.

Purpose of the Study:

• To characterize the light-propagation properties of OmniGuide fibers.
• To investigate the feasibility of single-mode propagation in large-core OmniGuide fibers.
• To assess the impact of various imperfections on fiber performance.

Main Methods:

• Analysis of the lowest-loss TE_01 mode propagation.
• Application of leaky mode and perturbation theory.
• Numerical simulations and derivation of general scaling relations.

Main Results:

• Demonstration of single-mode propagation for the TE_01 mode in large-core OmniGuide fibers.
• Suppression of cladding absorption and nonlinearity by orders of magnitude due to hollow-core confinement.
• Identification of tolerable levels for imperfections like bending and interface roughness.

Conclusions:

• OmniGuide fibers exhibit promising light-propagation characteristics.
• The technology allows for effective mode selection and loss reduction.
• OmniGuide fibers have the potential to outperform conventional silica fibers, even with suboptimal materials.