18 Result(s)

Article

Experimental demonstration of graph-state quantum secret sharing

Quantum communication and computing offer many new opportunities for information processing in a connected world. Networks using quantum resources with tailor-made entanglement structures have been proposed fo...

B. A. Bell, D. Markham, D. A. Herrera-Martí, A. Marin… in Nature Communications (2014)

Article

Experimental demonstration of a graph state quantum error-correction code

Scalable quantum computing and communication requires the protection of quantum information from the detrimental effects of decoherence and noise. Previous work tackling this problem has relied on the original...

B. A. Bell, D. A. Herrera-Martí, M. S. Tame, D. Markham… in Nature Communications (2014)

Article

Hollow-core photonic crystal fibres for delivery and compression of ultrashort optical pulses

We describe the use of tapered hollow-core photonic crystal fibres for delivery and compression of ultrashort optical pulses. We demonstrate delivery of transform-limited pulses with less than 100 fs pulse len...

J. C. Knight, F. Gérôme, W. J. Wadsworth in Optical and Quantum Electronics (2007)

Chapter and Conference Paper

Spectral-temporal soliton dynamics analysis near second zero-dispersion point in photonic crystal fibers

The propagation dynamics of an ultrashort optical pulse near the second zero-dispersion point of a small-core high-delta photonic crystal fiber is investigated using cross-correlation frequency-resolved optica...

Anatoly Efimov, A. J. Taylor, F. G. omenetto, N. Joly… in Ultrafast Phenomena XIV (2005)

Article

Maximization of supercontinua in photonic crystal fibers by using double pulses and polarization effects

We show with sub-20 fs pulses both experimentally and theoretically two techniques to control the width and polarization of spectral supercontinua generated in photonic crystal fibers. The first exploits doubl...

V.L. Kalashnikov, P. Dombi, T. Fuji, W.J. Wadsworth, J.C. Knight… in Applied Physics B (2003)

Article

Generation of a spectrally asymmetric third harmonic with unamplified 30-fs Cr:forsterite laser pulses in a tapered fiber

Unamplified subnanojoule 30-fs pulses of Cr:forsterite laser radiation are shown to generate the third-harmonic signal in a tapered fiber. Analysis of the dispersion properties of a tapered fiber indicates the...

D.A. Akimov, A.A. Ivanov, A.N. Naumov, O.A. Kolevatova, M.V. Alfimov… in Applied Physics B (2003)

Article

Doubly phase-matched cascaded parametric wave mixing of ultrashort laser pulses

Doubly phase-matched cascaded parametric wave mixing of femtosecond laser pulses in tapered fibers is experimentally demonstrated. Fibers with an appropriately tailored dispersion profile allow simultaneous ph...

D. A. Akimov, M. V. Alfimov, A. A. Ivanov… in Journal of Experimental and Theoretical Ph… (2003)

Article

Two-octave spectral broadening of subnanojoule Cr:forsterite femtosecond laser pulses in tapered fibers

Spectral broadening of femtosecond Cr:forsterite laser pulses is enhanced due to the use of tapered fibers. Supercontinuum generation with unamplified subnanojoule femtosecond Cr:forsterite laser pulses is obs...

D.A. Akimov, A.A. Ivanov, M.V. Alfimov, S.N. Bagayev, T.A. Birks… in Applied Physics B (2002)

Article

Spectral superbroadening of subnanojoule Cr:Forsterite femtosecond laser pulses in a tapered fiber

Spectral superbroadening of subnanojoule femtosecond Cr:forsterite laser pulses is demonstrated for the first time in experiments with a tapered fiber. Coupling 40-fs 0.6-nJ pulses of 1.25-μm Cr:forsterite las...

D. A. Akimov, A. A. Ivanov, M. V. Alfimov… in Journal of Experimental and Theoretical Ph… (2001)

Article

Absolute frequency measurement of iodine lines with a femtosecond optical synthesizer

We have used a single laser femtosecond optical frequency synthesizer together with a widely tunable Nd:YAG laser to measure the absolute frequency of several absorption lines in molecular iodine around 532 nm...

R. Holzwarth, A.Yu. Nevsky, M. Zimmermann, Th. Udem, T.W. Hänsch… in Applied Physics B (2001)

Article

Efficient distributed feedback solid state dye laser with a dynamic grating

We present the first operation of a distributed feedback solid state dye laser with a dynamic, pump-induced grating. Broadly tunable, narrow band operation in the region of 616 nm (604–649 nm) has been demonst...

W.J. Wadsworth, I.T. McKinnie, A.D. Woolhouse, T.G. Haskell in Applied Physics B (1999)

Reference Work Entry In depth

Cumulate textures

W. J. Wadsworth in Petrology (1990)

Article

The 1972 Eruption of Kartala volcano, grande comore

A summit eruption of Kartala commenced on September 8th, 1972 and finished on October 5th, 1972. In the course of this eruption, approximately 5×10⁶ m³ of alkali olivine basalt was erupted from a N-S fissure syst...

B. G. J. Upton, W. J. Wadsworth, E. Latrille in Bulletin Volcanologique (1974)

Article

Peridotitic and gabbroic rocks associated with the shield-forming lavas of réunion

The peridotitic and gabbroic rocks described occur a) as a tectonically emplaced layered body in Piton des Neiges volcano, b) as blocks in basaltic agglomerate, Piton des Neiges, and c) as nodular inclusions i...

B. G. J. Upton, W. J. Wadsworth in Contributions to Mineralogy and Petrology (1972)

Article

Early volcanic rocks of réunion and their tectonic significance

A great sequence of hydrothermally altered and tectonically disturbed lavas and breccias is exposed in the erosional cirques of Piton des Neiges volcano, Réunion. These rocks are cut by intense swarms of minor...

B. G. J. Upton, W. J. Wadsworth in Bulletin Volcanologique (1969)

Article

The basalts of Réunion Island, Indian Ocean

Réunion consists of two shield volcanoes, Piton des Neiges (3069 m) and Piton de la Fournaise (2631 m). The former is extinct and deeply eroded, so that its internal structure is clearly displayed. The deepest...

B. G. J. Upton, W. J. Wadsworth in Bulletin Volcanologique (1966)