Light guiding properties of negative-curvature hollow-core fiber

Wang, Yuxi

doi:10.32657/10356/155743

Cited by 2 publications

(2 citation statements)

References 127 publications

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“…The number of meshes is set to be around 600,000. The effective refractive index of air is n air = 1, and the effective refractive index of silica material is determined by the Sellmeier equation [33]. The refractive index of silica is 1.444 at the wavelength of 1.55 μm.…”

Section: Resultsmentioning

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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Section: Resultsmentioning

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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“…1, where the black area represents silica material and the white area represents air. The index of air is n air = 1, and the index of silica material is determined by the Sellmeier equation [24]. The node-free cladding structure is adopted to prevent the nodes between the cladding tubes from causing additional resonance of the transmission band [16].…”

Section: The Structure Of the Fibermentioning

confidence: 99%

Ultralow loss hollow-core nested-tube negative curvature fiber

Zhang

Xu²,

Yang³

et al. 2023

Advanced Fiber Laser Conference (AFL2022)

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Hollow-core fiber (HCF) has attracted great interest from researchers because of its high damage threshold and small nonlinearity compared with solid-core fiber. However, how to reduce the loss of HCF has always been an urgent problem to be solved. Aiming to solve the problem, we propose a novel hollow-core negative curvature fiber (HC-NCF) with an elliptical nested tube and a circular nested tube. The structure of this HC-NCF is relatively simple, which greatly reduces the difficulty of fabrication. Finite element modeling has been used to simulate and calculate the confinement loss (CL) and bending loss (BL) of the fiber with different nested tube structures. Results show that the CL of the LP 01 mode is as low as 6.48×10 -6 dB/km at the interesting wavelength of 1.06 μm. It exhibits a minimum CL of 5.28×10 -6 dB/km at 1.01 μm with maintaining a loss of less than 0.003 dB/km over 1020 nm (0.77 μm to 1.79 μm) bandwidth. In addition, we proposed the HC-NCF has been confirmed to have better-bending resistance. Within a bending radius of 5-40 cm, the HC-NCF has a BL below 3.75×10 -4 dB/km at a 10 cm bending radius; the BL is below 1.03×10 -5 dB/km at a 40 cm bending radius.

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Light guiding properties of negative-curvature hollow-core fiber

Cited by 2 publications

References 127 publications

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

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

Ultralow loss hollow-core nested-tube negative curvature fiber

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