Characterization of surface-states in a hollow core photonic crystal fiber

Lamilla, Erick; Faria, Maicon S.; Aldaya, Ivan; Jarschel, Paulo F.; Pita, Julian L.; Dainese, Paulo

doi:10.1364/oe.26.032554

Cited by 6 publications

(3 citation statements)

References 32 publications

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“…In the experiments, mode coupling will occur at the wavelength when one fiber's two refractive index curves are crossed or closed. The mode coupling has been demonstrated in photonic crystal fiber [17][18][19][20][21], photonic band gap fiber [22], and negative curvature fiber [23]. A similar situation also exists in theoretical simulations, so it is very hard to lock the calculator in one fixed mode during the simulations of mode analysis at discrete wavelengths for few-mode or multi-mode fibers.…”

Section: Introductionmentioning

confidence: 84%

Differential derivation method for high accuracy calculation of the refractive index curves

Li¹,

Wang²,

Jia³

et al. 2023

Preprint

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<p>A differential derivation method is demonstrated to high-accurately calculate the refractive index curves by solving the mode coupling problems in theoretical calculations. Because of the existence of mode coupling, the finite element method cannot lock the calculator in the interested mode, especially at the crossing part of two refractive index curves. Either imaginary crossing or real crossing will result in an inaccurate calculation of the refractive index curve. The calculation accuracy in the crossing parts is improved by using the differential derivation method, and the effectiveness is verified by calculating the refractive index curves for the HE11, HE12, TE01, and EH11 modes of a custom-designed fiber.</p>

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Section: Introductionmentioning

confidence: 84%

Differential derivation method for high accuracy calculation of the refractive index curves

Li¹,

Wang²,

Jia³

et al. 2023

Preprint

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show abstract

“…4 (b). By using this approach, the data is analyzed over small staggered wavelength windows which is eventually assembled to form a map of the differential group delay (DGD) as a function of wavelength [19,20]. The Hann window was used in this paper for data analysis.…”

Section: Lp01 Modesmentioning

confidence: 99%

Surface-mode induced high birefringence in a low-loss 7-cell photonic bandgap hollow-core fiber

Yu,

Chaochao,

et al. 2024

Preprint

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In this paper, a low-loss high-birefringence 7-cell photonic-bandgap hollow-core fiber (PBG-HCF) is designed and fabricated based on the method of surface mode engineering. Within a smooth transmission band from 1472 nm to 1560 nm, a minimum attenuation of 39 dB/km is measured where up to 3.29*10^-3 group birefringence is achieved. The windowed Fourier transform (WFT) is applied in the analysis of spectral beating measurement results. The wavelength dependence of group birefringence of fundamental and higher-order modes is resolved.

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“…Accurate control of surface modes in a hollowcore photonic bandgap fiber Yong You, Yan-Ge Liu, Yundong Hao, Huiyi Guo, and Zhi Wang I directly observed the strong coupling between SMs and the CM of HC-PBF through an improved S 2 (spatially and spectrally resolved imaging) method [21]. These studies have deepened our understanding of SMs.…”

Section: Introductionmentioning

confidence: 97%

Accurate Control of Surface Modes in a Hollow-Core Photonic Bandgap Fiber

You¹,

Liu²,

Hao³

et al. 2022

IEEE Photonics J.

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The abrupt termination of periodic structures in hollow-core photonic bandgap fiber (HC-PBF) cladding introduces surface modes (SMs). This results in a high loss and small available bandwidth. This has become an important factor that restricts the development of HC-PBFs. For many years, there has been a lack of clear understanding of SMs. In this study, SMs were considered the main body of research. First, a pure HC-PBF platform was constructed to systematically observe the SMs inside the bandgap. The core wall was used as a control variable to achieve precise control of the SMs. The SMs are divided into two categories: fundamental and high-order SMs. We named the SMs and studied their characteristics, including the mode field shape, coupling bandwidth, and coupling speed. The coupling characteristics of SMs with different core diameters were compared and analyzed. Further, we compared the model with actual fiber to prove the practicality of the theoretical analysis. This study will deepen our understanding of HC-PBF and will have a positive impact on its development.

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Characterization of surface-states in a hollow core photonic crystal fiber

Cited by 6 publications

References 32 publications

Differential derivation method for high accuracy calculation of the refractive index curves

Differential derivation method for high accuracy calculation of the refractive index curves

Surface-mode induced high birefringence in a low-loss 7-cell photonic bandgap hollow-core fiber

Accurate Control of Surface Modes in a Hollow-Core Photonic Bandgap Fiber

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