Journal ArticleDOI
Selective excitation of higher order modes in hollow-core PCF via prism-coupling
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TLDR
Prism-coupling through the microstructured cladding is used to selectively excite individual higher order modes in hollow-core photonic crystal fibers, allowing accurate measurement of the effective indices and transmission losses of modes of arbitrary order.Abstract:
Prism-coupling through the microstructured cladding is used to selectively excite individual higher order modes in hollow-core photonic crystal fibers (PCFs). Mode selection is achieved by varying the angle between the incoming beam and the fiber axis, in order to match the axial wavevector component to that of the desired mode. The technique allows accurate measurement of the effective indices and transmission losses of modes of arbitrary order, even those with highly complex transverse field distributions that would be extremely difficult to excite by conventional endfire coupling.read more
Citations
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Journal ArticleDOI
Broadband robustly single-mode hollow-core PCF by resonant filtering of higher-order modes.
P. Uebel,M. C. Günendi,Michael H. Frosz,G. Ahmed,N. N. Edavalath,Jean-Michel Ménard,Philip St. J. Russell +6 more
TL;DR: A hollow-core photonic crystal fiber that is engineered so as to strongly suppress higher-order modes, i.e., to provide robust LP01 single-mode guidance in all the wavelength ranges where the fiber guides with low loss is reported.
Journal ArticleDOI
Characterization of evolution of mode coupling in a graded-index polymer optical fiber by using Brillouin optical time-domain analysis
TL;DR: Compared with silica GI-MMFs, GI-POFs exhibit more efficient mode coupling and the excellent ablility of mode scrambling regardless of alignment conditions.
Journal ArticleDOI
Tunable Modal Birefringence in a Low-Loss Van Der Waals Waveguide.
TL;DR: The modal birefringence between the orthogonally polarized TE and TM modes is shown to be tunable in both sign and magnitude via varying the thickness of the MoS2 microcrystal, which represents a unique new opportunity to control the polarization behavior of photons with vdW materials.
Journal ArticleDOI
Monitoring the Wobbe Index of Natural Gas Using Fiber-Enhanced Raman Spectroscopy.
Vincenz Sandfort,Barbara M. Trabold,Amir Abdolvand,Amir Abdolvand,Carsten Bolwien,Philip St. J. Russell,Jürgen Wöllenstein,Jürgen Wöllenstein,Stefan Palzer +8 more
TL;DR: This paper compares the performance of two types of hollow-core photonic crystal fiber, namely photonic bandgap PCF and kagomé-style PCF, and assesses their potential for online determination of the Wobbe index.
Journal ArticleDOI
Higher-order mode suppression in twisted single-ring hollow-core photonic crystal fibers.
N. N. Edavalath,M. C. Günendi,R. Beravat,Gordon K. L. Wong,Michael H. Frosz,Jean-Michel Ménard,P. St. J. Russell +6 more
TL;DR: Spinning the preform during drawing introduces a continuous helical twist, offering a novel means of controlling the modal properties of hollow-core SR-PCF, and Prism-assisted side-coupling is used to measure the losses, refractive indices, and near-field patterns of individual fiber modes in both the straight and twisted cases.
References
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Journal ArticleDOI
Tweezers with a twist
Miles J. Padgett,Richard Bowman +1 more
TL;DR: The fact that light carries both linear and angular momentum is well-known to physicists as discussed by the authors, and one application of the linear momentum of light is for optical tweezers, in which the refraction of a laser beam through a particle provides a reaction force that draws the particle towards the centre of the beam.
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
Generation and Photonic Guidance of Multi-Octave Optical-Frequency Combs
TL;DR: Generation and guidance of a three-octave spectral comb, spanning wavelengths from 325 to 2300 nanometers, in a hydrogen-filled hollow-core photonic crystal fiber, is demonstrated, opening up a robust and much simplified route to synthesizing attosecond pulses.
Journal ArticleDOI
Radially polarized optical vortex converter created by femtosecond laser nanostructuring of glass
TL;DR: In this paper, the authors demonstrate the generation of optical vortices with radial or azimuthal polarization using a space variant polarization converter, fabricated by femtosecond laser writing of self-assembled nanostructures in silica glass.
Journal ArticleDOI
Ultrafast nonlinear optics in gas-filled hollow-core photonic crystal fibers [Invited]
TL;DR: In this article, the use of hollow-core photonic crystal fibers (PCFs) in the field of ultrafast gas-based nonlinear optics, including recent experiments, numerical modeling, and a discussion of future prospects, is discussed.