Hybrid antiresonant negative-curvature optical fibers: theoretical analysis and sensing application

In this paper we developed the understanding of a guidance mechanism of hybrid antiresonant negative-curvature fiber. We elucidated how the loss and cutoff wavelengths of core-guided modes depend on the lattice tube thickness and diameter for this fiber. We also derived an approximate expression to calculate the cutoff wavelengths for this hybrid antiresonant negative-curvature (core having higher refractive index than cladding) fiber. Finally, we explored the application of hybrid antiresonant fiber, proving its superior sensing capabilities compared to conventional hollow-core antiresonant fiber.