Research on hollow-core terahertz fiber based on Bragg anti-resonant elements arranged in a hexagonal structure

Ding, Jin-Long; Ding, Li-Sha; Chen, Ming-Yang; Dong, Zhe-Yan

doi:10.1016/j.ijleo.2024.171809

Cited by 1 publication

(1 citation statement)

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“…The various optical properties of HC-ARFs can be achieved by designing cladding elements. The cladding elements reported in the existing literatures include single ring, double ring, nested ring, elliptical tube, conjoined tube, and nested elliptical tube [2,3,8,[11][12][13][14][15][16][17][18] etc. For example, in 2017, Meng et al designed a new HC-ARF with nested elliptical cladding with a minimum transmission loss of 3.99 × 10 −3 dB km −1 at 800 nm and bending loss of less than 1 dB km −1 for bending radius larger than 5 cm [16].…”

Section: Introductionmentioning

confidence: 99%

Design of hollow-core anti-resonant optical fiber based on bragg elements with low-loss and wide bandwidth

Ding,

Chen,

Ding

2024

Phys. Scr.

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A type of anti-resonant hollow-core optical fiber consisting of Bragg elements is proposed. The confinement and bending losses are numerically simulated using the finite element method. It is found that the introduction of concentric rings to form anti-resonant structure can reduce the mode transmission loss by 2~4 orders of magnitude compared with the anti-resonant element composed of only one dielectric layer, therefore it can achieve ultra-low loss optical transmission. The influence of the structural parameters on the confinement loss was investigated. Furthermore, it is demonstrated that each dielectric layer independently contributes to the confinement of the core modes. It is also found that the Bragg reflection structure can effectively suppress the coupling between core and cladding modes, and achieve broadband low-loss optical transmission under small bending radius. In particular, it can achieve a low transmission loss of less than 0.1 dB/km over a wide wavelength range of 600 nm at the bending radius of 3 cm.

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