Ultra-Low-Loss Hollow-Core Bragg Antiresonant Fiber With Super Bandwidth Transmission Window

A novel hollow-core antiresonant fiber with a Bragg structure is proposed. It is numerically simulated using a commercial finite element method, and optical properties of the fiber, such as mode field, confinement loss, and bend loss, are numerically analyzed. The proposed hollow-core antiresonant fiber has advantageous optical properties, such as ultralow confinement loss, large bandwidth, and low bend loss. The structural advantage of the hollow-core Bragg antiresonant fiber also facilitates the fabrication of long-distance hollow-core antiresonant fibers. Additionally, this fiber offers potential applications in long-distance communications, data transmission, and laser power delivery.