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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Patent
Apparatus and methods for measuring vibrations using spectrally-encoded endoscopy
TL;DR: In this article, an apparatus and method according to an exemplary embodiment of to the present invention can provide imaging information associated with at least one portion of a sample, where the imaging information of the portion can be provided based on the first transverse locations, the second transverse location and the motion.
Journal ArticleDOI
Guided modes of one-dimensional photonic bandgap waveguides
Jie Li,Kin Seng Chiang +1 more
TL;DR: In this paper, the authors analyzed the dispersion of a slab waveguide with a low-index layer sandwiched between two photonic bandgap structures and proposed a nomenclature system for the guided modes based on the mode-field patterns in the waveguide.
Journal ArticleDOI
Design of photonic bandgap fibers by topology optimization
TL;DR: In this paper, a method based on topology optimization is presented to design the cross section of hollow-core photonic bandgap fibers for minimizing energy loss by material absorption, which is modeled by the time-harmonic wave equation and solved with the finite element program Comsol Multiphysics.
Journal ArticleDOI
Hybrid modes in a Bragg fiber: general properties and formulas under the quarter-wave stack condition
TL;DR: In this paper, the authors presented general properties and useful formulas of hybrid modes in a Bragg fiber by using an asymptotic expansion method, and showed that the Bragg fibers have a formal equivalence to those in the usual step-index fiber, the circular metallic waveguide and fundamental optics.
Journal ArticleDOI
Wideband Low Loss Hollow Core Fiber With Nested Hybrid Cladding Elements
TL;DR: In this article, an antiresonant nodeless hollow core fiber with nested hybrid cladding elements is proposed without having large distance between core and jacket capillary, which leads to extremely low loss over wide band compared to existing structures.
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.
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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.
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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.
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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.