Tapered fibers embedded in silica aerogel (2009)
Xiao, L. M., Grogan, M.D.W., Leon-Saval, S.G., Williams, R., England, R., Wadsworth, W.J., ...
Post-processing and tapering of PCFs (2008)
Leon-Saval, S. G., Birks, T. A., Witkowska, A., Ke, Lai, Wadsworth, W. J.
New methods have been developed in post-processing and tapering of PCFs to achieve a variety of low-loss optical devices. Interfacing between waveguides with very different properties and highly...
Compression of picosecond optical pulses in tapered hollow-core photonic bandgap fiber (2008)
Cook, K, Welch, M. G., Gerome, F, George, A. K, Wadsworth, W. J., Knight, J. C.
We demonstrate nonlinear compression of 2.5ps and 1.2ps laser pulses at 800nm wavelength using a 35m tapered hollow-core photonic bandgap fiber with continuously-decreasing dispersion.
We generate a 99% polarized supercontinuum from a 1064nm microchip laser by use of a highly birefringent photonic crystal fiber. We also demonstrate tunable visible/UV generation in BIBO pumped by...
Quantum interference with photon pairs using two micro-structured fibres (2007)
Fulconis, J., Alibart, O., Wadsworth, W. J., Rarity, J. G.
We demonstrate a quantum interference experiment between two photons coming from non-degenerate pairs created by four-wave mixing in two separated micro-structured fibres. When the two heralded...
Wavelength-independent all-fiber mode converters (2007)
Lai, K., Leon-Saval, S. G., Witkowska, A., Wadsworth, W. J., Birks, T. A.
Hollow-core photonic crystal fibres for delivery and compression of ultrashort optical pulses (2007)
Knight, J. C., Gerome, F., Wadsworth, W. J.
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...
Delivery of sub-100fs pulses through 8m of hollow-core fiber using soliton compression (2007)
Gerome, F., Cook, K., George, A. K., Wadsworth, W. J., Knight, J. C.
Alibart, O., Fulconis, J., Wong, G. K. L., Murdoch, S. G., Wadsworth, W. J., Rarity, J. G.
We develop a theoretical analysis of four-wave mixing used to generate photon pairs useful for quantum information processing. The analysis applies to a single mode microstructured fibre pumped by an...
Liquid-crystal-based in-fiber tunable spectral structures (2006)
Zalevsky, Z., Luan, F., Wadsworth, W. J., Saval, S. L., Birks, T. A.
Enhanced visible continuum generation from a microchip 1064nm laser (2006)
Xiong, C., Witkowska, A., Leon-Saval, S. G., Birks, T. A., Wadsworth, W. J.
All-fiber anamorphic core-shape transitions (2006)
Witkowska, A., Lai, K., Leon-Saval, S. G., Wadsworth, W. J., Birks, T. A.
Fibre core shape transitions for optical interfacing (2006)
Lai, K., Witkowska, A., Leon-Saval, S. G., Wadsworth, W. J., Birks, T. A.
Transitions in core shape are formed in photonic crystal fibres by differential pressurisation of the holes and localised heating. Low-loss anamorphic transitions to rectangular and annular cores are...
Humbert, G., Wadsworth, W. J., Leon-Saval, S. G., Knight, J. C., Birks, T. A., Russell, P. S. J., ...
High brightness single mode source of correlated photon pairs using a photonic crystal fiber (2005)
Fulconis, J., Alibart, O., Wadsworth, W. J., Russell, P. St. J., Rarity, J. G.
We demonstrate a picosecond source of correlated photon pairs using a micro-structured fibre with zero dispersion around 715 nm wavelength. The fibre is pumped in the normal dispersion regime at ~708...
65 THz beat frequency observed from a scalar modulation instability experiment (2005)
Kruhlak, Robert, Wong, Gordon, Clark, Heather, Leonhardt, Rainer, Harvey, John, Knight, J C, ...
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the...
Continuous-wave tunable optical parametric generation in a photonic-crystal fiber (2005)
Wong, G. K. L., Chen, A. Y. H., Murdoch, S. G., Leonhardt, R., Harvey, J. D., Joly, N. Y., ...
Hole inflation and tapering of stock photonic crystal fibres (2005)
Wadsworth, W. J., Witkowska, A., Leon-Saval, S. G., Birks, T. A.
Photonic crystal fiber source of correlated photon pairs (2005)
Rarity, J. G., Fulconis, J., Duligall, J., Wadsworth, W. J., Russell, P. S.
Splice-free interfacing of photonic crystal fibers (2005)
Leon-Saval, S. G., Birks, T. A., Joly, N. Y., George, A. K., Wadsworth, W. J., Kakarantzas, G., ...
Wavelength-independent high-extinction fibre mode convertor (2005)
Leon-Saval, S. G., Birks, T. A., George, A. K., Wadsworth, W. J., Russell, P. St J.
We have used photonic crystal fibre techniques to construct a mode converter. It couples light from LP/sub 01/ to LP/sub 11/ modes with extinction ratio >30 dB at all wavelengths from 650-1750 nm.
High brightness single mode source of correlated photon pairs using a photonic crystal fiber (2005)
Fulconis, J., Alibart, O., Wadsworth, W. J., Russell, P. S., Rarity, J. G.
Widely tunable optical parametric generation in a photonic crystal fiber (2005)
Chen, A. Y. H., Wong, G. K. L., Murdoch, S. G., Leonhardt, R., Harvey, J. D., Knight, J. C., ...
Optical micro- and nano-structures using fibre tapers (2005)
Birks, T. A., Leon-Saval, S. G., Wadsworth, W. J., Russell, P. St J.
Tapering of conventional and photonic crystal fibres can be used to make glass-air waveguides down to submicron scales, and gives them ready-made low-loss interfaces to simplify input and output...
Very high numerical aperture fibers (2004)
Wadsworth, W. J., Percival, R. M., Bouwmans, G., Knight, J. C., Birks, T. A., Hedley, T. D., ...
Compact supercontinuum generation and four-wave mixing in PCF with 10 ns laser pulses (2004)
Wadsworth, W. J., JoIy, N. Y., Biancalana, F., Knight, J. C., Birks, T. A., Russell, P. St J.
We report broad flat supercontinuum, 500-1750+ nm, using a kHz train of nanosecond Q-switched microchip laser pulses at 1064 nm or 1047 nm. The same systems exhibit strong parametric generation of...
Supercontinuum generation in submicron fibre waveguides (2004)
Leon-Saval, S. G., Birks, T. A., Wadsworth, W. J., Russell, P. S. J., Mason, M. W.
Simple optical profiling of complex guiding structures (2004)
Efimov, A., Taylor, A. J., Omenetto, F. G., Knight, J. C., Wadsworth, W. J., Russell, P. S.
Octave supercontinuum generated in tapered conventional fibres by a nanosecond 1064 nm laser (2004)
Cordeiro, C. M. B., Wadsworth, W. J., Birks, T. A., Russell, P. St J.
We demonstrated a 650 nm wide supercontinuum generated in tapered fibres immersed in heavy water. The pump source was a low-cost diode-pumped Nd:YAG laser with a pulse width of 0.6 ns and an output...
Wavelength dependence of induced nonlinear effects in photonic crystal fibre (2003)
Stormont, B., Kemp, A.*, Mazilu, M., Brown, C.T.A., Wadsworth, W.J., Knight, J.C., ...
Summary form only given. In this paper, we report a systematic study of spectral effects at various wavelengths relative to the zero group velocity dispersion (GVD) point in the fibre. The fibres...
Wavelength dependence of induced nonlinear effects in photonic crystal fibre (2003)
Stormont, B., Kemp, A., Mazilu, M., Brown, C.T.A., Wadsworth, W.J., Knight, J.C., ...
Summary form only given. In this paper, we report a systematic study of spectral effects at various wavelengths relative to the zero group velocity dispersion (GVD) point in the fibre. The fibres...
Wavelength dependence of induced nonlinear effects in photonic crystal fibre (2003)
Stormont, B., Kemp, A., Mazilu, M., Brown, C.T.A., Wadsworth, W.J., Knight, J.C., ...
Summary form only given. In this paper, we report a systematic study of spectral effects at various wavelengths relative to the zero group velocity dispersion (GVD) point in the fibre. The fibres...
High power air-clad photonic crystal fibre laser (2003)
Wadsworth, W. J., Percival, R. M., Bouwmans, G., Knight, J. C., Russel, P. S. J.
High power photonic crystal fibre laser with very high NA pump cladding (2003)
Percival, R. M., Wadsworth, W. J., Bouwmans, G., Knight, J. C., Birks, T. A., Hedley, T. D., ...
4 W of laser power at 1040 nm has been achieved for the first time from an Yb-doped double clad PCF. The inner cladding of this fibre has the highest NA yet reported of 0.7-0.8.
Polarization dependent harmonic generation in microstructured fibers (2003)
Omenetto, F. G., Efimov, A., Taylor, A. J., Knight, J. C., Wadsworth, W. J., Russell, P. S. J.
Enhanced two-photon biosensing with double-clad photonic crystal fibers (2003)
Myaing, M. T., Ye, J. Y., Norris, T. B., Thomas, T., Baker, J. R., Wadsworth, W. J., ...
Phase-matched third harmonic generation in microstructured fibers (2003)
Efimov, A., Taylor, A. J., Omenetto, F. G., Knight, J. C., Wadsworth, W. J., Russell, P. S.
High-power Er : Yb fiber laser with very high numerical aperture pump-cladding waveguide (2003)
Bouwmans, G., Percival, R. M., Wadsworth, W. J., Knight, J. C., Russell, P. S. J.
High power Er/Yb fiber laser with very high numerical aperture pump cladding waveguide (2003)
Bouwmans, G., Percival, R. M., Wadsworth, W. J., Knight, J. C., Birks, T. A., Russell, P. St J.
High power Er/Yb lasers at 1.55 /spl mu/m are attractive for a number of applications, for example sensors, spectroscopy and free space telecommunications. In this paper, we report a double-clad...
Compact ultrahigh resolution oct system for real-time in vivo imaging (2003)
Bourquin, S., Hsiung, P., Hard, I., Aguirre, A. D., Ko, T. H., Fujimoto, J. G., ...
Doubly phase-matched cascaded wave mixing in tapered fibers (2003)
Akimov, D. A., Kolevatova, O. A., Fedotov, A. B., Konorov, S. O., Podshivalov, A. A., Zhelticov, A. M., ...
Doubly phase-matched cascaded four-wave mixing in tapered fibers is demonstrated using femtosecond Cr:forsterite laser pulses. The first stage of this cascade involves phase-matched third-harmonic...
Frequency conversion of femtosecond Cr : forsterite-laser pulses in a tapered fibre (2003)
Akimov, D. A., Ivanov, A. A., Alfimov, M. V., Fedotov, A. B., Birks, T. A., Wadsworth, W. J., ...
Doubly phase-matched cascaded parametric wave mixing of ultrashort laser pulses (2003)
Akimov, D. A., Alfimov, M. V., Ivanov, A. A., Fedotov, A. B., Birks, T. A., Wadsworth, W. J., ...
Picritic magmas and the Rum ultramafic complex, Scotland (2002)
Upton, B.G.J., Skovgaard, A.C., McClurg, J., Kirstein, L., Cheadle, M., Emeleus, C.H., ...
Three small picritic dykes, intruded at a late stage in the evolution of the Rum basic-ultra-basic complex, Inner Hebrides, shed new light on the nature of the magmas responsible for the main...
Soliton self-frequency shift effects in photonic crystal fibre (2002)
Reid, D. T., Cormack, I. G., Wadsworth, W. J., Knight, J. C., Russell, P. S. J.
Submicrometer axial resolution optical coherence tomography (2002)
Povazay, B., Bizheva, K., Unterhuber, A., Hermann, B., Sattmann, H., Fercher, A. F., ...
High resolution OCT imaging using a spectrally broadened femtosecond Nd:glass laser (2002)
Hartl, I., Hsiung, R., Ko, T. H., Fujimoto, J. G., Birks, T. A., Wadsworth, W. J.
We demonstrate a new light source for OCT using a compact Nd:glass femtosecond laser spectrally broadened in a tapered single mode fiber. A reflective grating phase delay line permits high speed,...
Harbold, J. M., Wise, F. W., Birks, T. A., Wadsworth, W. J.
Summary form only given. We have demonstrated that the second zero in the GVD of a narrow waist tapered fiber can be used to generate a continuum at wavelengths comparable to and longer than the...
Long-wavelength continuum generation about the second dispersion zero of a tapered fiber (2002)
Harbold, J. M., Ilday, F. O., Wise, F. W., Birks, T. A., Wadsworth, W. J., Chen, Z.
Observation of soliton self-frequency shift in photonic crystal fibre (2002)
Cormack, I. G., Reid, D. T., Wadsworth, W. J., Knight, J. C., Russell, P. S. J.
Supercontinuum generation in tapered fibres (2002)
Birks, T. A., Bahloul, D., Man, T. P. M., Wadsworth, W. J., Russell, P. St J.
Summary form only given. The key feature of the microstructured fibre is the large index step between core (silica) and cladding (mostly air). This permits confinement in a very small core and hence...
Bagayev, S. N., Goncharenko, A. M., Zakharyash, V. F., Klementyev, V. M., Kolker, D. B., Kuznetsov, S. A., ...
Formation and distortions of the ultrashort pulse train spectrum broadened in tapered fiber (2002)
Bagayev, S. N., Chepurov, S. V., Denisov, V. I., Klementyev, V. M., Kolker, D. B., Korel, I. I., ...
We propose a theoretical description and give experimental results of the ultrashort pulse train spectral broadening in tapered fibers. A multi-peak spectral structure due to the effect of self-phase...
Spectral shaping of supercontinuum in a cobweb photonic-crystal fiber with sub-20-fs pulses (2002)
Apolonski, A., Povazay, B., Unterhuber, A., Drexler, W., Wadsworth, W. J., Knight, J. C., ...
Akimov, D. A., Fedotov, A. B., Podshivalov, A. A., Zheltikov, A. M., Ivanov, A. A., Alfimov, M. V., ...
We present the results of our experiments devoted to the investigation of the spectral broadening of femtosecond Cr:forsterite laser pulses in tapered fibers. Unamplified Cr:forsterite laser pulses...
White-light frequency comb generation with a diode-pumped Cr:LiSAF laser (2001)
Holzwarth, R., Zimmermann, M., Udem, T., Hansch, T.W., Russbuldt, P., Gabel, K., ...
Simultaneous generation of spectrally distinct third harmonics in a photonic crystal fiber (2001)
Omenetto, F. G., Taylor, A. J., Moores, M. D., Arriaga, J., Knight, J. C., Wadsworth, W. J., ...
White-light frequency comb generation with a diode-pumped Cr : LiSAF laser (2001)
Holzwarth, R., Zimmermann, M., Udem, T., Hansch, T. W., Russbuldt, P., Gabel, K., ...
Absolute frequency measurement of iodine lines with a femtosecond optical synthesizer (2001)
Holzwarth, R., Nevsky, A. Y., Zimmermann, M., Udem, T., Hansch, T. W., Von Zanthier, J., ...
Wavelength-tunable soliton generation in the 1400 -1600 nm region using an Yb fiber laser (2001)
Fermann, M. E., Stock, M. L., Harter, D., Birks, T., Wadsworth, W. J., Russell, P. St J.
Soliton pulses tunable in the 1400 - 1600 nm region are generated in standard telecom fiber seeded with a continuum produced in a fiber taper using an Yb fiber laser. Here we demonstrate...
White-light supercontinuum generation with 60-ps pump pulses in a photonic crystal fiber (2001)
Coen, S., Chan, A. H. L., Leonhardt, R., Harvey, J. D., Knight, J. C., Wadsworth, W. J., ...
Supercontinuum generation in fused fibre couplers (2001)
Birks, T. A., Wadsworth, W. J.
Summary form only given. Supercontinuum (SC) light with a 400-1600 nm spectrum has been generated in optical fibres using unamplified femtosecond Ti:sapphire lasers. The fibre can be a special...
Bagayev, S. N., Dmitriyev, A. K., Chepurov, S. V., Dychkov, A. S., Klementyev, V. M., Kolker, D. B., ...
Efficient tunable ultraviolet generation in periodically poled lithium niobate (1999)
White, R. T., Bowen, W. P., McKinnie, I. T., Wadsworth, W. J.
Efficient tunable ultraviolet generation in periodically poled lithium niobate (1999)
White, R. T., Bowen, W. P., McKinnie, I. T., Wadsworth, W. J.
Copper vapour laser pumped Ti:sapphire lasers / (1997)
BLDSC reference no.: D198134.
Types of Igneous Cumulates (1960)
WAGER, L. R., BROWN, G. M., WADSWORTH, W. J.
The term ‘cumulate’ is proposed as a group name for igneous rocks formed by crystal accumulation. After accumulation of the crystal precipitate, various ways of completing the crystallization...
Picritic magmas and the Rum ultramafic complex, Scotland
Upton, B.G.J., Skovgaard, A.C., McClurg, J., Kirstein, L., Cheadle, M., Emeleus, C.H., ...
Three small picritic dykes, intruded at a late stage in the evolution of the Rum basic-ultra-basic complex, Inner Hebrides, shed new light on the nature of the magmas responsible for the main...
Picritic magmas and the Rum ultramafic complex, Scotland
Upton, B.G.J., Skovgaard, A.C., McClurg, J., Kirstein, L., Cheadle, M., Emeleus, C.H., ...
Three small picritic dykes, intruded at a late stage in the evolution of the Rum basic-ultra-basic complex, Inner Hebrides, shed new light on the nature of the magmas responsible for the main...