Robust photonic band gaps for hollow core guidance in PCF made from high index glass

Pottage, J.M.; Bird, David M.; Hedley, T.D.; Knight, J.C.; Birks, T.A.; Russell, P.St.J.; Roberts, P. J.

doi:10.1364/oe.11.002854

Cited by 78 publications

(38 citation statements)

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“…In case of the fabrication issue of our proposed structure, it is important to discuss the robustness of the structure. The studies [50] show that low air-filling ratio of air holes makes a fiber robust. In our optimized structure, air filling ratio of the cladding holes is set to 0.79 which is tolerable for fabrication.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Photonic Crystal Fiber Based Sensor for Detecting Binary Liquid Mixture

Arif¹,

Biddut²,

Babu³

et al. 2017

OPJ

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Detection of liquid mixture of different volume ratio is very important in industrial purposes. The paper reports a sensing mechanism of binary liquid mixture for different volume fraction, based on the measurement of refractive index of the mixture. Here, a highly sensitive liquid filled core Photonic Crystal Fiber structure has been proposed to detect liquid mixture solution. Numerical investigation of the proposed structure is carried out by employing full vectorial Finite Element Method (FEM).

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Photonic Crystal Fiber Based Sensor for Detecting Binary Liquid Mixture

Arif¹,

Biddut²,

Babu³

et al. 2017

OPJ

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“…We call this method sampling (see e.g. [7,17,16,18,15]). The advantage of this method is that all of the Fourier coefficients of f are computed cheaply using a single FFT.…”

Section: Planewave Expansion Methods With Samplingmentioning

confidence: 99%

“…In this paper we consider the problem of computing spectral band gaps (that arise from the periodicity) and guided modes (that occur due to the compact perturbation) in PCFs using the planewave expansion method. This method is a popular choice for this type of problem, [7,6,17,16,18].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, we also consider two variants: (a) coupling the planewave expansion method with a regularisation technique where the discontinuous coefficients are approximated by smooth coefficients (see [11,7,16]), and (b) approximating the Fourier coefficients of the discontinuous coefficients in the governing equation via a sampling technique (see e.g. [7,17,16,18,15]). Variant (b) is usually necessary in practice, because explicit formulae for the Fourier coefficients of the discontinuous coefficients are only available for simple geometries.…”

Section: Introductionmentioning

confidence: 99%

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Planewave expansion methods for photonic crystal fibres

Norton

Scheichl

2013

Applied Numerical Mathematics

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Photonic crystal fibres are novel optical devices that can be designed to guide light of a particular frequency. This requires two phenomena to occur. First, the frequency of light must be in a gap of the spectrum of the fibre's cladding (usually a periodic arrangement of air holes), so that the cladding acts as a barrier to that frequency of light. Second, the perturbation or defect in the middle of the fibre must allow a localised or trapped mode to exist in a spectral gap of the cladding so that light may propagate inside the defect. In this paper the performance of planewave expansion methods for computing such spectral gaps and trapped eigenmodes in photonic crystal fibres is carefully analysed. The occurrence of discontinuous coefficients in the governing equation means that exponential convergence is impossible due to the limited regularity of the eigenfunctions. However, we show through a numerical convergence study and rigorous analysis on a simplified problem that the planewave expansion method is at least as good as standard finite element schemes on uniform meshes in both error convergence and computational efficiency. More importantly, we also consider the performance of two commonly used variants of the planewave expansion method: (a) coupling the planewave expansion method with a regularisation technique where the discontinuous coefficients in the governing equation are approximated by smooth functions, and (b) approximating the Fourier coefficients of the discontinuous coefficients in the governing equation. There is no evidence that regularisation improves the planewave expansion method, but with the correct choice of parameters both variants can be used efficiently without adding significant errors.

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“…While it is theoretically possible to achieve HC-PBGFs from glasses with a higher refractive index (and transmitting at longer wavelengths) than silica, due to the increasing importance of vector effects, the bandgaps are generally found to be narrower [35,36]. Interestingly, they are obtained by claddings at significantly lower air-filling fractions than those required in silica HC-PBGFs.…”

Section: Pbg Bandwidthmentioning

confidence: 99%

Hollow-core photonic bandgap fibers: technology and applications

2013

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Since the early conceptual and practical demonstrations in the late 1990s, Hollow-Core Photonic Band Gap Fibres (HC-PBGFs) have attracted huge interest by virtue of their promise to deliver a unique range of optical properties that are simply not possible in conventional fibre types. HC-PBGFs have the potential to overcome some of the fundamental limitations of solid fibres promising, for example, reduced transmission loss, lower nonlinearity, higher damage thresholds and lower latency, amongst others. They also provide a unique medium for a range of light: matter interactions of various forms, particularly for gaseous media. In this paper we review the current status of the field, including the latest developments in the understanding of the basic guidance mechanisms in these fibres and the unique properties they can exhibit. We also review the latest advances in terms of fibre fabrication and characterisation, before describing some of the most important applications of the technology, focusing in particular on their use in gas-based fibre optics and in optical communications.

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Robust photonic band gaps for hollow core guidance in PCF made from high index glass

Cited by 78 publications

References 0 publications

Photonic Crystal Fiber Based Sensor for Detecting Binary Liquid Mixture

Photonic Crystal Fiber Based Sensor for Detecting Binary Liquid Mixture

Planewave expansion methods for photonic crystal fibres

Hollow-core photonic bandgap fibers: technology and applications

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