Author
Philip St. J. Russell
Other affiliations: University of Southampton, University of Erlangen-Nuremberg, University of Bath
Bio: Philip St. J. Russell is an academic researcher from Max Planck Society. The author has contributed to research in topics: Photonic-crystal fiber & Photonic crystal. The author has an hindex of 47, co-authored 356 publications receiving 16560 citations. Previous affiliations of Philip St. J. Russell include University of Southampton & University of Erlangen-Nuremberg.
Papers published on a yearly basis
Papers
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23 Jun 2019
TL;DR: In this paper, a ring of thin-walled glass capillaries surrounding a central hollow core is used to measure the structural integrity along the taper of a single-ring hollow-core photonic crystal fiber.
Abstract: Single-ring hollow-core photonic crystal fibre (SR-PCF), consisting of a ring of thin-walled glass capillaries surrounding a central hollow core, can offer remarkably low transmission loss [1], and is finding applications in, e.g., wavelength conversion and pulse compression in gases, high-power beam delivery and circular dichroism [2]. As with all microstructured fibres, it is highly desirable to continuously measure the internal structural parameters (e.g. the capillary diameter) during fibre drawing. This would improve the yield of useful fibre lengths, as well as offering better control of structural uniformity along the fibre. Successful tapering of hollow-core fibres also requires a non-destructive method of verifying structural integrity along the taper.
1 citations
14 Sep 2018
TL;DR: In this paper, a spatial light modulator is used to create amplitude and phase distributions that closely match those of the fiber modes, resulting in typical launch efficiencies of 10-20% into the liquid-filled core.
Abstract: Higher-order modes are controllably excited in water-filled kagome-, bandgap-style, and simplified hollow-core photonic crystal fibers (HC-PCF). A spatial light modulator is used to create amplitude and phase distributions that closely match those of the fiber modes, resulting in typical launch efficiencies of 10–20% into the liquid-filled core. Modes, excited across the visible wavelength range, closely resemble those observed in air-filled kagome HC-PCF and match numerical simulations. These results provide a framework for spatially-resolved sensing in HC-PCF microreactors and fiber-based optical manipulation.
1 citations
21 May 2006
TL;DR: In this article, strong in-plane confinement of acoustic phonons in air-glass PCFs with sub-wavelength-scale cores is shown to result in an acoustic mode cut-off frequency, which acts like a Raman resonance.
Abstract: Strong in-plane confinement of acoustic phonons in air-glass PCFs with sub-wavelength-scale cores is shown to result in an acoustic mode cut-off frequency, which acts like a Raman resonance. Spontaneous and photoacoustic measurements illustrate the effect.
1 citations
01 Jun 2019
TL;DR: In this paper, it was shown that photoionization and subsequent recombination-induced heating leads to a drop in refractive index tens of μs long, caused by a gas density depression in the core after an acoustic shock wave has propagated away.
Abstract: Nonlinear propagation of intense ultrashort laser pulses in gases is mostly understood to be influenced only by the pulse itself, i.e., by single-shot dynamics, because relaxation processes are typically faster than the time between pulses. Using single-ring hollow-core photonic crystal fibre (PCF) [1], strong-field intensities can be reached by μΐ-level pulses, available from MHz-level repetition rate fibre lasers. At these high repetition rates it is not clear that pulse-to-pulse interactions can still be neglected. Indeed, experiments involving photoionization show a strong repetition rate-dependence, suggesting that the pulse dynamics are influenced by inter-pulse effects [1]. Recently it has been shown, using interferometric side-probing [2], that fs photoionization and subsequent recombination-induced heating leads to a drop in refractive index tens of μs long, caused by a gas density depression in the core after an acoustic shock wave has propagated away. Here we report that this modifies the characteristics of the fibre, influencing pulse propagation even at 100 kHz repetition rate.
1 citations
03 Aug 2020
TL;DR: In this paper, the use of in-situ Raman spectroscopy within optofluidic hollow-core photonic crystal fibers was used to monitor reactions involving photo-induced electron transfer processes.
Abstract: We present the use of in-situ Raman spectroscopy within optofluidic hollow-core photonic crystal fibers to monitor reactions involving photo-induced electron transfer processes, demonstrating their utility to better understand mechanisms of photochemical reactions. © 2020 The Authors
1 citations
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TL;DR: The field of cavity optomechanics explores the interaction between electromagnetic radiation and nano-or micromechanical motion as mentioned in this paper, which explores the interactions between optical cavities and mechanical resonators.
Abstract: We review the field of cavity optomechanics, which explores the interaction between electromagnetic radiation and nano- or micromechanical motion This review covers the basics of optical cavities and mechanical resonators, their mutual optomechanical interaction mediated by the radiation pressure force, the large variety of experimental systems which exhibit this interaction, optical measurements of mechanical motion, dynamical backaction amplification and cooling, nonlinear dynamics, multimode optomechanics, and proposals for future cavity quantum optomechanics experiments In addition, we describe the perspectives for fundamental quantum physics and for possible applications of optomechanical devices
4,031 citations
TL;DR: In this article, a periodic array of microscopic air holes that run along the entire fiber length are used to guide light by corralling it within a periodic arrays of microscopic holes.
Abstract: Photonic crystal fibers guide light by corralling it within a periodic array of microscopic air holes that run along the entire fiber length Largely through their ability to overcome the limitations of conventional fiber optics—for example, by permitting low-loss guidance of light in a hollow core—these fibers are proving to have a multitude of important technological and scientific applications spanning many disciplines The result has been a renaissance of interest in optical fibers and their uses
3,918 citations
Journal Article•
TL;DR: In this article, a fast Fourier transform method of topography and interferometry is proposed to discriminate between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour generation techniques.
Abstract: A fast-Fourier-transform method of topography and interferometry is proposed. By computer processing of a noncontour type of fringe pattern, automatic discrimination is achieved between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour-generation techniques. The method has advantages over moire topography and conventional fringe-contour interferometry in both accuracy and sensitivity. Unlike fringe-scanning techniques, the method is easy to apply because it uses no moving components.
3,742 citations
TL;DR: In this paper, the authors review the recent developments in the area of optical fiber grating sensors, including quasi-distributed strain sensing using Bragg gratings, systems based on chirped gratings and intragrating sensing concepts.
Abstract: We review the recent developments in the area of optical fiber grating sensors, including quasi-distributed strain sensing using Bragg gratings, systems based on chirped gratings, intragrating sensing concepts, long period-based grating sensors, fiber grating laser-based systems, and interferometric sensor systems based on grating reflectors.
3,665 citations
04 Oct 2006
TL;DR: In this paper, a review of numerical and experimental studies of supercontinuum generation in photonic crystal fiber is presented over the full range of experimentally reported parameters, from the femtosecond to the continuous-wave regime.
Abstract: A topical review of numerical and experimental studies of supercontinuum generation in photonic crystal fiber is presented over the full range of experimentally reported parameters, from the femtosecond to the continuous-wave regime. Results from numerical simulations are used to discuss the temporal and spectral characteristics of the supercontinuum, and to interpret the physics of the underlying spectral broadening processes. Particular attention is given to the case of supercontinuum generation seeded by femtosecond pulses in the anomalous group velocity dispersion regime of photonic crystal fiber, where the processes of soliton fission, stimulated Raman scattering, and dispersive wave generation are reviewed in detail. The corresponding intensity and phase stability properties of the supercontinuum spectra generated under different conditions are also discussed.
3,361 citations