Single-polarization single-mode broadband ultra-low loss hollow-core anti-resonant fiber with nested double C-type cladding tubes

Gong, Yujie; Meng, Yichao

doi:10.1016/j.optcom.2023.130062

Optics Communications

2024

DOI: 10.1016/j.optcom.2023.130062

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Single-polarization single-mode broadband ultra-low loss hollow-core anti-resonant fiber with nested double C-type cladding tubes

Yujie Gong,

Yichao Meng

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Cited by 3 publications

References 33 publications

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Broadband high birefringence and single-polarization hollow-core anti-resonant fibers with an elliptical-like core

Ran,

Meng

2025

Optics Communications

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Broadband high birefringence and single-polarization hollow-core anti-resonant fibers with an elliptical-like core

Ran,

Meng

2025

Optics Communications

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Highly birefringent anti-resonant hollow-core fiber with meniscoid nested structure

Wang,

Zhang,

Chen

et al. 2024

Opt. Express

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We propose a meniscoid nested anti-resonant hollow-core fiber (MAF), wherein the fourfold rotational symmetry structure enables high birefringence and low loss in dual-wavelength range. Numerical investigation and simulation for variations in wall thickness along orthogonal directions are conducted, through which a formulated optimization criterion revealing the relationship between minimum difference in wall thickness and birefringence of 10−5 is obtained. A parameter of beat length to loss ratio η is defined to evaluate MAF performance with respect to birefringence and confinement loss (CL). With optimized MAF structure, the birefringence and CL are improved to 3.62 × 10−5 and 8.5 dB/km at 1.06 µm, 9.83 × 10−5 and 204.1 dB/km at 1.55 µm, respectively. Meanwhile, the bandwidths extend to 172 nm at 1.06 µm and 216 nm at 1.55 µm, and the superior bending resistance characteristics are validated. Our work offers valuable guidance for designing and optimizing highly birefringent anti-resonant hollow-core fiber (ARF), and the proposed MAF has great potential in polarization-dependent transmission and interferometric fiber gyroscopes.

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Dual-hollow-core anti-resonant fiber with silicon layers and nested resonant tubes for constructing a single-polarization 3 dB coupler

Hou,

Wang,

Lou

et al. 2024

Opt. Express

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A novel dual-hollow-core anti-resonant fiber (DHC-ARF) with silicon layers and nested resonant tubes is proposed for constructing a 3 dB single-polarization coupler. High-index silicon layers are deposited inside four cladding tubes along the x-direction and then nested resonant tubes are introduced into these cladding tubes, which is beneficial to promote the mode coupling between the x-polarized fundamental mode and the dielectric mode in the silica/silicon tubes so as to achieve single-polarization characteristics of the DHC-ARF. The properties of the DHC-ARF are optimized using finite element method combined with perfectly matched layer as a boundary condition. By using a 1.51 cm long DHC-ARF, a single-polarization 3 dB coupler is constructed with a relatively wide bandwidth of 29 nm covering the wavelength range from 1530 nm to 1559 nm, in which the polarization extinction ratio (PER) is lower than -20 dB and the coupling ratio can be guaranteed within 50 ± 2%. This bandwidth is more than 2.6 times higher than the bandwidth of currently reported single-polarization coupler. At the wavelength of 1550 nm, the lowest PER reaches -74.8 dB and the loss of the coupler is as low as 0.33 dB.

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Single-polarization single-mode broadband ultra-low loss hollow-core anti-resonant fiber with nested double C-type cladding tubes

Cited by 3 publications

References 33 publications

Broadband high birefringence and single-polarization hollow-core anti-resonant fibers with an elliptical-like core

Broadband high birefringence and single-polarization hollow-core anti-resonant fibers with an elliptical-like core

Highly birefringent anti-resonant hollow-core fiber with meniscoid nested structure

Dual-hollow-core anti-resonant fiber with silicon layers and nested resonant tubes for constructing a single-polarization 3 dB coupler

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