Multi-nested antiresonant hollow-core fiber with ultralow loss and single-mode guidance

We propose an antiresonant hollow-core fiber design that exhibits ultralow loss and exceptional single modedness at 1.55 & mu;m. In this design, the confinement loss of less than 10-6 dB m-1 can be obtained with excellent bending performance even at a tight bending radius of 3 cm. At the same time, a record-high higher-order mode extinction ratio of 8 x 105 can be achieved in the geometry by inducing strong coupling between the higher-order core modes and cladding hole modes. These guiding properties make it an excellent candidate for applications in hollow-core fiber-enabled low-latency telecommunication systems. & COPY; 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

We propose a novel antiresonant hollow-core fiber design with ultralow loss and exceptional single modedness at 1.55μm wavelength. The design achieves a confinement loss of less than 10-6 dB m-1 and excellent bending performance even at a tight bending radius of 3 cm. Moreover, it achieves a record-high higher-order mode extinction ratio of 8 x 105 by inducing strong coupling between the higher-order core modes and cladding hole modes. These guiding properties make it an excellent candidate for hollow-core fiber-enabled low-latency telecommunication systems.