Exploring the Effect of the Core Boundary Curvature in Hollow Antiresonant Fibers

Putten, L. D. van; Fokoua, Eric Numkam; Mousavi, Seyed Mohammad Abokhamis; Belardi, Walter; Chaudhuri, Subhasis; Badding, John V.; Poletti, Francesco

doi:10.1109/lpt.2016.2644198

Cited by 24 publications

(4 citation statements)

References 15 publications

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“…x 11 The coupling between core modes and cladding modes is slightly enhanced for large R a /R b . As shown in figure 6(b), at small R a /R b (ranging from 0.5 to 0.7), Δn eff decreases as R a /R b increasing.…”

Section: Impacts Of Structure Parametersmentioning

confidence: 99%

“…For instance, the 'node-free' design where the cladding membranes do not touch each other [8], and the 'nested tubes' structure where small tubes with the same thickness as the outer ones are attached to fiber cladding [9]. Another solution to minimize the loss in HC-ARF is based on half-elliptical cladding elements, which can lead to orders of magnitude loss reduction and improved structural stability during fabrication [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Low-loss polarization-maintaining hollow-core anti-resonant terahertz fiber

Han¹,

Li²,

Wu³

et al. 2019

J. Opt.

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Polarization-maintaining terahertz (THz) fibers have been considered as fundamental elements in polarization sensitive THz systems. Based on the anti-resonant waveguiding mechanism, we propose a low-loss polarization-maintaining hollow-core THz fiber with four half-elliptical cladding membranes. Numerical simulations indicate that birefringence of the fundamental mode group could be introduced by modifying the thickness of a pair of membranes while sacrificing available low-loss bandwidth. We observe that the core size, the dimension and shape of cladding membranes, have significant impacts on modal properties. For the half-circular membranes based fiber with optimized parameters, the attenuation coefficients of fundamental modes are below 10 dB m−1, the birefringence is above 10−4 and the group velocity dispersion values are lower than 60 ps THz−1 m−1 within the frequency bandwidths of 0.46–0.6 THz and 0.74–1.1 THz. At 0.9 THz, the lowest attenuation coefficient is 0.5 dB m−1 with birefringence of 1.52 × 10−4. Moreover, this THz fiber is insensitive to neither x- nor y-direction bend with a bend radius no less than 2 cm.

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Section: Impacts Of Structure Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low-loss polarization-maintaining hollow-core anti-resonant terahertz fiber

Han¹,

Li²,

Wu³

et al. 2019

J. Opt.

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show abstract

“…Low-loss transmission of light is achieved through coherent reflections from the thin core walls which can be modelled as Fabry-Perot resonators [1]. Additionally, it is established that the negative-curvature shape of the core boundary plays an important role in the reduction of the modal field overlap with the cladding material in AR-HCFs [2,3], contributing to the high laser damage threshold, low optical nonlinearity, and low waveguide dispersion. So far AR-HCFs have demonstrated successes in the delivery of high-power lasers and ultrashort pulses over long lengths [4,5].…”

Section: Introductionmentioning

confidence: 99%

Low-loss multi-mode anti-resonant hollow-core fibers

Yu¹,

Wu²,

Wu³

et al. 2023

Preprint

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In this work, multi-mode anti-resonant hollow-core fiber (AR-HCF) with 18 fan-shaped resonators is fabricated and characterized. The ratio of core diameter over transmitted wavelengths in the lowest transmission band is up to 85. The measured attenuation at 1 μm wavelength is below 0.1 dB/m and the bend loss below 0.2 dB/m at a bend radius smaller than 8 cm. Modal content of the multi-mode AR-HCF is characterized using the S2 imaging technique and seven LP-like modes in total are identified using a 23.6 meter fiber length. Multi-mode AR-HCFs for longer wavelengths are fabricated by scaling up the same design, extending the transmission window beyond 4 µm wavelength. Low-loss multi-mode AR-HCF could find applications in the delivery of high-power laser light with a medium beam quality, where higher coupling efficiency and laser damage threshold are expected.

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“…The development of this fiber structure has led to the demonstration of attenuation below 10 dB/km [5], and the insertion within this same structure of additional anti-resonant elements (first proposed in [6]) is expected to reduce their attenuation even below 1 dB/km [7]. Moreover, the underlying physical principles of anti-resonant HCs are still being explored [8] and may lead to further advances in the fiber geometry [9] and in the realization of novel optical fiber-based devices [10,11].…”

Section: Introductionmentioning

confidence: 99%

Borosilicate Based Hollow-Core Optical Fibers

Belardi

Sazio

2019

Fibers

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We discuss the fabrication of hollow-core optical fibers made of borosilicate glass. We show that, despite the high attenuation of the glass relative to silica, the fiber optical losses can be of the same order of magnitude of those obtained by using ultrapure silica glass. Short lengths of the fabricated fibers, used in combination with incoherent optical sources, provide single-mode optical guidance in both near and mid-infrared spectral ranges without any additional optical components.

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Exploring the Effect of the Core Boundary Curvature in Hollow Antiresonant Fibers

Cited by 24 publications

References 15 publications

Low-loss polarization-maintaining hollow-core anti-resonant terahertz fiber

Low-loss polarization-maintaining hollow-core anti-resonant terahertz fiber

Low-loss multi-mode anti-resonant hollow-core fibers

Borosilicate Based Hollow-Core Optical Fibers

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