496 research outputs found
Electromagnetically induced transparency in acetylene molecules with counterpropagating beams in V and Lambda schemes
No full textAbstract not availableP. S. Light, F. Benabid, G. J. Pearce, F. Couny, and D. M. Bir
Frequency stabilisation of a fibre-laser comb using a novel microstructured fibre
No full textAbstract not availableC.R. Locke, E.N. Ivanov, P. S. Light, F. Benabid, and A.N. Luite
Analysis and Assessment of Tube Thickness Variation Effect in Hollow-Core Inhibited Coupling Tube Lattice Fibers
No full textHollow-Core Inhibited Coupling Fibers have been the target of great investigation efforts due to their peculiar properties [1]. These features, in addition to their capability to handle high power levels, make this kind of fibers very attractive for a wide range of applications such as high-power lasing, light-gas interaction, plasma photonics, quantum physics, terahertz systems, and gas- and bio-sensing. The guidance mechanism of Inhibited Coupling (IC) fibers relies on the spatial mismatch between core modes and cladding modes (CLMs). In this way, the coupling between core and CLMs, caused by their spatial overlap, is dramatically reduced [1]. An effective way to strengthen this effect is to deploy hypocycloid core-contour (i.e. negative curvature) fiber designs [2]. A negative curvature core can be simply obtained by fabricating a cladding structure made of a layer of thin isolated glass tubes arranged around the hollow core (Tube Lattice Fibers - TLFs) [3] , [4]. Although TLFs have reached an extremely low transmission loss and are intensely developed [5] , [6] a gap remains between measured transmission and the theoretical minimum given by confinement loss (CL). This difference can be ascribed to geometrical non-idealities of the fiber structure, introduced during the fabrication process, even though a theoretical analysis showing the real reason for this gap is not yet available
Observation of electromagnetically induced transparency (EIT) in Rb-filled hollow-core fibre
No full textAbstract not availableT.M. Stace, C. Perrella, P.S. Light, F. Benabid, A.N. Luite
2D+1 and 3D Simulation Methods for Hollow Core Fibers Non-Idealities Analysis
No full textWe propose three numerical approaches for the analysis of Hollow Core fibers non-idealities along fiber propagation direction. The first two are 2D+1 approaches and relies on the Coupled Mode Theory and the Mode Matching Method. While the third is a full 3D method since it relies on a 3D finite element method simulation
Transverse Roughness Effect on Fundamental Mode Confinement Loss and Modal Content of Hollow-Core Inhibited Coupling Tube Lattice Fibers
No full textThe effects of the transverse surface roughness on fiber loss and modal content in hollow-core inhibited coupling tube lattice fibers is numerically investigated. Relationship between roughness spectrum and loss of core modes is assessed
Transverse Roughness: Modeling and Effects Analysis on Inhibited Coupling Fibers
No full textA Transverse Roughness theoretical model based on the Azimuthal Fourier Decomposition is proposed to analyse the effects of this perturbation on the Confinement Loss of Hollow-Core Inhibited Coupling Fibers. Scaling laws are also given
Mode Coupling and Ultimate Loss Limit in Hollow Core Fibers
No full textA theoretical model describing the modes coupling in hollow core inhibited coupling fibers is presented. This model gives new insights about the ultimate limits in terms of loss and bandwidth of this kind of fibers
Transverse Roughness Effect on Fundamental Mode Confinement Loss and Modal Content of Hollow-Core Inhibited Coupling Tube Lattice Fibers
No full textThe effects of the transverse surface roughness on fiber loss and modal content in hollow-core inhibited coupling tube lattice fibers is numerically investigated. Relationship between roughness spectrum and loss of core modes is assessed
Mode Coupling Effect on Ideal and Real Hollow-Core Inhibited-Coupling Fibers
No full textConfinement mechanism in Hollow-Core Inhibited-Coupling fibers is based on the inhibition of the caoupling between core modes and cladding modes. In this work we present theoretical and numerical methodologies to estimate the mode coupling effects on fiber loss and single mode propagation
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