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William J. Wadsworth
Researcher at University of Bath
Publications - 313
Citations - 14253
William J. Wadsworth is an academic researcher from University of Bath. The author has contributed to research in topics: Photonic-crystal fiber & Optical fiber. The author has an hindex of 55, co-authored 310 publications receiving 13520 citations. Previous affiliations of William J. Wadsworth include University of Vienna & Heriot-Watt University.
Papers
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Optical frequency synthesizer for precision spectroscopy
Ronald Holzwarth,Th. Udem,Theodor W. Hänsch,Jonathan Knight,William J. Wadsworth,P. St. J. Russell +5 more
TL;DR: The frequency comb generated by a femtosecond mode-locked laser is used and broadened to more than an optical octave in a photonic crystal fiber to realize a frequency chain that links a 10 MHz radio frequency reference phase-coherently in one step to the optical region.
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Highly birefringent photonic crystal fibers
A. Ortigosa-Blanch,Jonathan Knight,William J. Wadsworth,Jesús Arriaga,Brian Joseph Mangan,Tim A. Birks,P. St. J. Russell +6 more
TL;DR: Based on spectral measurements of the polarization mode beating, it is estimated that the strongly anisotropic photonic crystal fiber has a beat length of approximately 0.4 mm at a wavelength of 1540 nm, in good agreement with the results of modeling.
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Supercontinuum generation in tapered fibers
TL;DR: In this paper, a supercontinuum light with a spectrum more than two octaves broad (370-1545 nm at the 20-dB level) was generated in a standard telecommunications fiber by femtosecond pulses from an unamplified Ti:sapphire laser.
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Anomalous dispersion in photonic crystal fiber
Jonathan Knight,Jesús Arriaga,Tim A. Birks,A. Ortigosa-Blanch,William J. Wadsworth,P. St. J. Russell +5 more
TL;DR: In this paper, the authors describe the measured group-velocity dispersion characteristics of several air-silica photonic crystal fibers with anomalous group velocity dispersion at visible and near-infrared wavelengths.
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Submicrometer axial resolution optical coherence tomography
Boris Povazay,Kostadinka Bizheva,Angelika Unterhuber,Boris Hermann,Harald Sattmann,Adolf Friedrich Fercher,Wolfgang Drexler,Alexander Apolonski,William J. Wadsworth,Jonathan Knight,P. St. J. Russell,M. Vetterlein,E. Scherzer +12 more
TL;DR: Submicrometer-resolution OCT is demonstrated in vitro on human colorectal adenocarcinoma cells HT-29, a novel light source that has great potential for development of spectroscopic OCT because its spectrum covers the absorption bands of several biological chromophores.