Journal ArticleDOI
Single-Mode Photonic Band Gap Guidance of Light in Air.
R.F. Cregan,Brian Joseph Mangan,Jonathan Knight,Tim A. Birks,P. St. J. Russell,Peter John Roberts,Douglas C. Allan +6 more
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The confinement of light within a hollow core (a large air hole) in a silica-air photonic crystal fiber is demonstrated and certain wavelength bands are confined and guided down the fiber.Abstract:
The confinement of light within a hollow core (a large air hole) in a silica-air photonic crystal fiber is demonstrated Only certain wavelength bands are confined and guided down the fiber, each band corresponding to the presence of a full two-dimensional band gap in the photonic crystal cladding Single-mode vacuum waveguides have a multitude of potential applications from ultrahigh-power transmission to the guiding of cold atomsread more
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Method for configuring air-core photonic-bandgap fibers free of surface modes
Abstract: Coupling of core modes to surface modes in an air core photonic-bandgap fiber (PBF) can cause large propagation losses. Computer simulations analyze the relationship between the geometry and the presence of surface modes in PBFs having a triangular hole pattern and identify ranges of core characteristic dimensions (e.g., radii) for which the fiber supports no surface modes (i.e., only core modes are present) over the entire wavelength range of the bandgap. In particular, for a hole spacing and a hole radius = 0.47 , the core supports a single mode and supports no surface modes for core radii between about 0.7 and about 1.05 , which suggests that such fibers should exhibit a very low propagation loss. The existence of surface modes can be predicted simply and expediently by studying either the bulk modes alone or the geometry of the fiber without requiring a full analysis of the defect modes.
Journal ArticleDOI
Excitation of higher-order modes in optofluidic photonic crystal fiber.
Andrei Ruskuc,Philipp Koehler,Marius A. Weber,Ana Andres-Arroyo,Michael H. Frosz,Philip St. J. Russell,Tijmen G. Euser +6 more
TL;DR: Higher-order modes up to LP33 are controllably excited in water-filled kagomé- and bandgap-style hollow-core photonic crystal fibers and provide a framework for spatially-resolved sensing in HC-PCF microreactors and fiber-based optical manipulation.
Journal ArticleDOI
Design and characterization of rectangular slotted porous core photonic crystal fiber for sensing CO2 gas
TL;DR: In this article, a rectangular slotted porous core photonic crystal fiber (RSPC-PCF) was proposed for CO2 gas sensing using the COMSOL Multi-physics software with version 4.5.150.
Journal ArticleDOI
Analysis of ultra-high birefringent fully-anisotropic photonic crystal fiber
Rasha A. Hussein,Rasha A. Hussein,Mohamed Farhat O. Hameed,Jala El-Azab,Wessameldin S. Abdelaziz,Salah S. A. Obayya +5 more
TL;DR: In this paper, a high birefringent photonic crystal fiber (PCF) was proposed and analyzed using full vectorial finite element method using full permittivity tensor of the NLC material.
Journal ArticleDOI
Tunable Single-Polarization Single-Mode Negative-Curvature Fiber With an Asymmetrical Refractive Index Cladding for Mid-Infrared Region
TL;DR: In this paper, a hollow-core negative-curvature fiber implementing tunable single-polarization single-mode operation at mid-infrared region is proposed, which possesses a symmetrical geometry structure and asymmetrical refractive index cladding composed by two kinds of midinfrared glass with different refractive indexes.
References
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Journal ArticleDOI
All-silica single-mode optical fiber with photonic crystal cladding
TL;DR: The fabrication of a new type of optical waveguide: the photonic crystal fiber that supports a single robust low-loss guided mode over a very broad spectral range of at least 458-1550 nm.
Journal ArticleDOI
Endlessly single-mode photonic crystal fiber.
TL;DR: An effective-index model confirms that an all-silica optical fiber made by embedding a central core in a two-dimensional photonic crystal with a micrometer-spaced hexagonal array of air holes can be single mode for any wavelength.
Journal ArticleDOI
Hollow metallic and dielectric waveguides for long distance optical transmission and lasers
TL;DR: In this paper, the field configurations and propagation constants of a hollow circular waveguide made of dielectric material or metal for application as an optical waveguide were determined and the increase of attenuation due to curvature of the axis was also determined.
Journal ArticleDOI
Photonic Band Gap Guidance in Optical Fibers
TL;DR: A fundamentally different type of optical waveguide structure is demonstrated, in which light is confined to the vicinity of a low-index region by a two-dimensional photonic band gap crystal.
Journal ArticleDOI
Full 2-D photonic bandgaps in silica/air structures
TL;DR: In this paper, full 2D photonic bandgaps are demonstrated for all polarisations in structures with refractive index contrast as small as that of silica and air, and a new type of optical fiber based on these structures is proposed.