Showing papers by "Philip St. J. Russell published in 2008"
TL;DR: In this article, a pump-probe technique is used in which the resonances are excited by a train of optical pulses and probed in a Sagnac interferometer.
Abstract: Transverse acoustic resonances at gigahertz frequencies are excited by electrostriction in the few-micrometer-thick waists of low-loss optical fiber tapers of up to 40 cm long. A pump-probe technique is used in which the resonances are excited by a train of optical pulses and probed in a Sagnac interferometer. Strong radially symmetric acoustic resonances are observed and the dependence of their frequencies on taper thickness is investigated. Such easily reconfigurable acousto-optic interactions may have applications in the high-frequency mode locking of fiber lasers.
52 citations
01 Jan 2008
TL;DR: In this article, the authors provide an introduction to various types of photonic crystal fibers along with their established or emerging applications, including laser, amplifiers, dispersion compensators, and nonlinear processing.
Abstract: Publisher Summary Photonic crystal fibers (PCFs) have a periodic transverse microstructure and emerged as practical low-loss waveguides. They have extended the range of possibilities in optical fibers, both by improving well-established properties and by introducing new features such as low-loss guidance in a hollow core. This chapter provides an introduction to various types of PCFs along with their established or emerging applications. Applications of photonic crystal fibers include lasers, amplifiers, dispersion compensators, and nonlinear processing. Photonic crystal fiber structures are currently produced in many laboratories worldwide using a variety of different techniques. An important stage is to produce a There are many ways to do this, including stacking of capillaries and rods extrusion, sol-gel casting, injection molding, and drilling. The materials used range from silica to compound glasses, chalcogenide glasses, and polymers.
17 citations
31 Jan 2008
TL;DR: In this article, the core-guided light couples to leaky surface plasmon modes on the nanowires, at certain wavelengths, the core guided light couples with leaky surfaces.
Abstract: Metallic nanowire arrays are created by pumping molten metal into the hollow channels of silica glass PCF. Measurements show that, at certain wavelengths, the core-guided light couples to leaky surface plasmon modes on the nanowires.
4 citations
04 May 2008
TL;DR: In this paper, the optical properties of a polarization-preserving PCF in which two enlarged hollow channels on opposite sides of the core are filled with gold were investigated and the surface plasmon resonances and intriguing polarisation effects were observed.
Abstract: We report on the optical properties of a polarization-preserving PCF in which two enlarged hollow channels on opposite sides of the core are filled with gold. Surface plasmon resonances and intriguing polarisation effects are observed.
4 citations
TL;DR: In this paper, the authors describe photonische Kristallfasern, deren Mantel in Langsrichtung von Kanalen mit mikroskopischem Querschnitt durchzogen ist.
Abstract: Photonische Kristallfasern sind Glasfasern, deren Mantel in Langsrichtung von Kanalen mit mikroskopischem Querschnitt durchzogen ist. Uber den Faserquerschnitt betrachtet bilden diese ein periodisches Lochmuster. Sie wirken auf das transportierte Licht wie ein zweidimensionaler photonischer Kristall. Im Kern sind die Fasern entweder hohl oder mit Glas gefullt. Solche Fasern konnen zum Beispiel Laserlicht selektiv in der Grundschwingungsmode transportieren. Mit ihnen lassen sich auch extrem lange Fokustiefen erzielen. Das Licht leiten sie so gut, dass sie bei den internen Reflexionen zu den weltbesten Spiegeln gehoren. Gasgefullte Kanale machen sie zu empfindlichen Gassensoren und hocheffizienten Frequenzvervielfachern. Letztere lassen sich einfach in optische Bauelemente der Telekommunikation integrieren. Hohlkernfasern konnen sogar als lasergetriebene Teilchenbeschleuniger funktionieren. Nicht zuletzt stellen die Fasern ein wichtiges Bauteil im nobelpreisgekronten optischen Frequenzkamm dar. Sie eroffnen noch viele weitere Anwendungsfelder.
4 citations
Proceedings Article•
04 May 2008TL;DR: In this paper, a photonic crystal fiber is excited using laser pulses, which can be coherently controlled leading to a 100-fold increase in the amplitude of acoustic resonances.
Abstract: Acoustic resonances trapped within the glass core (1 mum diameter) of a photonic crystal fibre are excited electrostrictively using laser pulses. Using pulse sequences they can be coherently controlled leading to a 100-fold increase in their amplitude.
3 citations
04 May 2008
TL;DR: In this paper, a broadband in-fiber polarizer with suppression > 25 dB over 300 nm bandwidth is reported by introducing a high quality Ge nanowire into one of the hollow channels of a photonic crystal fiber.
Abstract: A broad-band in-fiber polarizer with suppression >25 dB over 300 nm bandwidth is reported. It is made by introducing a high quality Ge nanowire into one of the hollow channels of a photonic crystal fiber.
3 citations
31 Jan 2008
TL;DR: In this article, the dispersive properties of the eigenmodes of photonic crystal fibers have been studied and it was shown that the dispersion changes dramatically close to filter resonance.
Abstract: We study the dispersive properties of the eigenmodes of rocking filters produced in highly birefringent photonic crystal fibers. The dispersion changes dramatically close to filter resonance. Rocking filters provide more flexibility in dispersion engineering.
2 citations
04 May 2008
TL;DR: In this article, a sensitive evanescent field sensor using air-suspended solid core fibers is presented, where excellent agreement between measured and calculated mode profiles allows to measure quantitative broadband absorption spectra with sample volumes as low as 1 muL.
Abstract: We report a sensitive evanescent field sensor using air-suspended solid-core fibers. Excellent agreement between measured and calculated mode profiles allows us to measure quantitative broadband absorption spectra with sample volumes as low as 1 muL.
1 citations
31 Jan 2008
TL;DR: Through their unique properties, photonic crystal fibres are giving rise to numerous new applications spanning many areas of science as discussed by the authors, and they offer orders of magnitude improvement over previous technologies.
Abstract: Through their unique properties - often offering orders of magnitude improvement over previous technologies - photonic crystal fibres are giving rise to numerous new applications spanning many areas of science.
1 citations
25 Nov 2008
TL;DR: In this article, the interaction between light and microwave sound can be strongly enhanced by tight confinement within the wavelength-scale core of a nano-structured photonic crystal fiber, and a new family of efficient acousto-optical and nonlinear optical devices is emerging.
Abstract: The interaction between light and microwave sound can be strongly enhanced by tight confinement within the wavelength-scale core of a nano-structured photonic crystal fibre. A new family of efficient acousto-optical and nonlinear-optical devices is emerging.
04 May 2008
TL;DR: In this paper, forward Brillouin scattering in tapered fibers is studied and it is shown that strong acousto-optic interaction can take place in highly tapered fiber.
Abstract: We experimentally study forward Brillouin scattering in tapered fibers. Circularly symmetric acoustic phonons resonant in fibers are observed by using a novel photoacoustic measurement technique. Strong acousto-optic interaction can take place in highly tapered fibers.
31 Jan 2008
TL;DR: In this paper, the phase locking of the interacting fields leading to the phase difference independent of the optical path was investigated. And the phase lock was used to explain the non-phase matched anti-Stokes Raman generation in gas-filled hollow core PCF.
Abstract: We show that the efficient non-phase-matched anti-Stokes Raman generation observed in gas-filled hollow-core PCF can be explained by "phase locking" of the interacting fields leading to the establishment of a phase difference independent of the optical path.
TL;DR: Using a polarization-spectroscopy technique, this paper observed spontaneous forward Brillouin scattering of light in birefringent lead-silicate PCF, where the higher stress-optical coefficient of the glass means that signals can be detected even in short lengths of fiber.
Abstract: Using a polarization-spectroscopy technique, we observe spontaneous forward Brillouin scattering of light in birefringent lead-silicate PCF. The higher stress-optical coefficient of the glass means that signals can be detected even in short lengths of fiber.