Photo of John Williams
    • School of Engineering and Applied Science, Aston University

      B4 7ET Birmingham

      United Kingdom

    19942019
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    Research Output 1994 2019

    1994

    Dark soliton sideband formation and stability in periodically amplifed systems

    Allen, K. M., Smith, N. J., Doran, N. J. & Williams, J. A., 15 Dec 1994, In : Optics Letters. 19, 24, p. 2086-2088 3 p.

    Research output: Contribution to journalArticle

    sidebands
    solitary waves
    laser cavities
    four-wave mixing
    amplifiers

    Fibre dispersion compensation using a chirped in-fibre Bragg grating

    Williams, J. A. R., Bennion, I., Sugden, K. & Doran, N. J., 9 Jun 1994, In : Electronics letters. 30, 12, p. 985-987 3 p.

    Research output: Contribution to journalArticle

    Dispersion compensation
    Bragg gratings
    Group delay
    Fiber Bragg gratings
    Single mode fibers

    Optical autocorrelator that uses a surface-emitting second-harmonic generator on (211)B GaAs

    Whitbread, N. D., Williams, J. A. R., Roberts, J. S., Bennion, I. & Robson, P. N., Dec 1994, In : Optics Letters. 19, 24, p. 2089-2091 3 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    harmonic generators
    autocorrelation
    harmonic generations
    refractivity
    waveguides

    The generation and propagation of quasi-continuous trains of dark soliton-like pulses in 2km of optical fiber

    Williams, J. A. R., Allen, K. M., Doran, N. & Emplit, P. H., Aug 1994, Proceedings of 5th EQEC. p. 270-271 2 p. QThO3

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    The generation of quasi-continuous trains of dark soliton-like pulses

    Williams, J. A. R., Allen, K. M., Doran, N. & Emplit, P. H., Dec 1994, In : Optics Communications. 112, 5-6, p. 333-338 6 p.

    Research output: Contribution to journalArticle

    Solitons
    solitary waves
    pulses
    repetition
    fibers
    1995

    Fourier-transform-limited 2.5ps light pulses with electrically tunable wavelength (15nm) by hybridly modelocking a semiconductor laser in a chirped Bragg grating fibre external cavity

    Yu, J., Huhse, D., Schell, M., Schulze, M., Bimberg, D., Williams, J. A. R., Zhang, L. & Bennion, I., 9 Nov 1995, In : Electronics letters. 31, 23, p. 2008-2009 2 p.

    Research output: Contribution to journalArticle

    Fiber Bragg gratings
    Semiconductor lasers
    Fourier transforms
    Wavelength
    Frequency modulation

    Postfabrication exposure of gap-type bandpass filters in broadly chirped fiber gratings

    Zhang, L., Sugden, K., Williams, J. A. R., Bennion, I., Reid, D. C. J. & Ragdale, C. M., 15 Sep 1995, In : Optics Letters. 20, 18, p. 1927-1929 3 p.

    Research output: Contribution to journalArticle

    bandpass filters
    gratings
    fibers
    spacing
    bandwidth
    Self phase modulation
    Bragg gratings
    phase modulation
    Optical fibers
    Laser pulses

    Wide-band Fabry-Perot-like filters in optical fibre

    Town, G. E., Sugden, K., Williams, J. A. R., Bennion, I. & Poole, S. B., 1 Jan 1995, In : IEEE Photonics Technology Letters. 7, 1, p. 78-80 3 p.

    Research output: Contribution to journalArticle

    Optical fibers
    Resonators
    optical fibers
    resonators
    broadband
    1996

    Fabrication of highly efficient grating band-pass filters and their applications in soliton propagation system

    Zhang, L., Harper, P., Sugden, K., Williams, J. R., Knox, F. M., Kean, P. N., Bennion, I. & Doran, N., 20 Sep 1996, The International Society for Optical Engineering. Chan, K. T., Jian, S. & Tong, F. F. (eds.). SPIE, p. 432-440 9 p. (SPIE proceedings; vol. 2893).

    Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

    Open Access
    File
    bandpass filters
    solitary waves
    gratings
    rejection
    fabrication

    Fast wavelength switching of semiconductor laser pulses by self-seeding

    Huhse, D., Schell, M., Utz, W., Bimberg, D., Williams, J. A. R., Zhang, L. & Bennion, I., 30 Sep 1996, In : Applied Physics Letters. 69, 14, p. 2018-2020 3 p.

    Research output: Contribution to journalArticle

    inoculation
    semiconductor lasers
    pulses
    wavelengths
    tunable lasers

    Fiber Bragg grating fabrication for dispersion slope compensation

    Williams, J. A. R., Everall, L. A., Bennion, I. & Doran, N., Sep 1996, In : IEEE Photonics Technology Letters. 8, 9, p. 1187-1189 3 p.

    Research output: Contribution to journalArticle

    Fiber Bragg gratings
    Bragg gratings
    slopes
    Fabrication
    fabrication

    Fibre Bragg grating time delay control of phased array antennae

    Molony, A., Zhang, L., Williams, J. A. R., Bennion, I., Edge, C. & Fells, J., May 1996, In : Journal of Modern Optics. 43, 5, p. 1017-1024 8 p.

    Research output: Contribution to journalArticle

    phased arrays
    delay lines
    Bragg gratings
    time lag
    antennas
    1997

    Electron beam lithography of phase mask gratings for near field holographic production of optical fibre gratings

    Liu, X., Aitchison, J. S., De La Rue, R. M., Thoms, S., Zhang, L., Williams, J. A. R. & Bennion, I., Feb 1997, In : Microelectronic Engineering. 35, 1-4, p. 345-348 4 p.

    Research output: Contribution to journalArticle

    Electron beam lithography
    Optical fibers
    Masks
    near fields
    masks

    Fabrication and characterization of bandpass filters based on concatenated chirped fiber gratings

    Sugden, K., Zhang, L., Williams, J. A. R., Fallon, R. W., Everall, L. A., Chisholm, K. E. & Bennion, I., Aug 1997, In : Journal of Lightwave Technology. 15, 8, p. 1424-1432 9 p.

    Research output: Contribution to journalArticle

    Bandpass filters
    bandpass filters
    Germanium
    germanium
    gratings

    Fabrication of multipassband moiré resonators in fibers by the dual-phase-mask exposure method

    Everall, L. A., Sugden, K., Williams, J. A. R., Bennion, I., Liu, X., Aitchison, J. S., Thoms, S. & De La Rue, R. M., Oct 1997, In : Optics Letters. 22, 19, p. 1473-1475 3 p.

    Research output: Contribution to journalArticle

    masks
    resonators
    filters
    fabrication
    fibers

    Fiber Bragg-grating true time-delay systems: discrete-grating array 3-bit delay lines and chirped grating 6-bit delay lines

    Molony, A., Zhang, L., Williams, J. A. R., Bennion, I., Edge, C. & Fells, J., Dec 1997, In : IEEE Transactions on Microwave Theory and Techniques. 45, 8 PART 2, p. 1527-1530 4 p.

    Research output: Contribution to journalArticle

    Bragg gratings
    Diffraction gratings
    Electric delay lines
    delay lines
    Fiber Bragg gratings

    Longitudinal mode control of an erbium ring fibre laser containing an intracavity chirped Bragg grating etalon

    Forster, R. J., Langford, N., Gloag, A., Zhang, L., Williams, J. A. R. & Bennion, I., 15 Sep 1997, In : Optics Communications. 141, 5-6, p. 283-287 5 p.

    Research output: Contribution to journalArticle

    Erbium
    Bragg gratings
    Ring lasers
    ring lasers
    Fiber lasers

    Narrow linewidth operation of an erbium fiber laser containing a chirped Bragg grating etalon

    Foster, R. J., Langford, N., Gloag, A., Zhang, L., Williams, J. A. R. & Bennion, I., Nov 1997, In : Journal of Lightwave Technology. 15, 11, p. 2130-2136 7 p.

    Research output: Contribution to journalArticle

    Bragg reflectors
    Bragg gratings
    Ring lasers
    Erbium
    Fiber lasers
    1998

    All-fibre optical sensing system: Bragg grating sensor interrogated by a long-period grating

    Fallon, R. W., Zhang, L., Everall, L. A., Williams, J. A. R. & Bennion, I., Dec 1998, In : Measurement Science and Technology. 9, 12, p. 1969-1973 5 p.

    Research output: Contribution to journalArticle

    Long Period Grating
    Optical Sensing
    Bragg gratings
    Diffraction gratings
    Bragg Grating

    Apodised fibre Bragg grating design subject to length constraints

    Chisholm, K. E., Everall, L. A., Williams, J. A. R., Bennion, I., Liu, X., Rue, R. M. D. L. & Aitchison, J. S., Sep 1998, 24th European Conference on Optical Communication, 1998. IEEE, Vol. 1. p. 385-386 2 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Fiber Bragg gratings
    Bandwidth
    Fabrication

    Characteristics of linearly chirped and functionally apodised phase masks and reflection spectra of UV written fibre gratings

    Liu, X., Aitchison, J. S., Thoms, S., De La Rue, R. M., Williams, J. A. R., Everall, L. A. & Bennion, I., Sep 1998, Conference on Lasers and Electro-Optics Europe, 1998. 1998 CLEO/Europe. Glasgow: IEEE, p. 145 1 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Fibre optic radio frequency notch filter with linear and continuous tuning by using a chirped fibre grating

    Zhang, W., Williams, J. A. R., Everall, L. A. & Bennion, I., 3 Sep 1998, In : Electronics letters. 34, 18, p. 1770-1772 3 p.

    Research output: Contribution to journalArticle

    Notch filters
    Fiber optics
    Signal processing
    Tuning
    Fibers

    Surface roughness reduction and diffraction efficiency optimisation for e-beam written phase masks

    Liu, X., Thoms, S., Aitchison, J. S., De La Rue, R. M., Williams, J. A. R., Everall, L. A. & Bennion, I., Mar 1998, In : Microelectronic Engineering. 41-42, p. 199-202 4 p.

    Research output: Contribution to journalArticle

    Diffraction efficiency
    Masks
    surface roughness
    masks
    Surface roughness
    1999

    Bragg grating fast tunable filter for wavelength division multiplexing

    Iocco, A., Limberger, H. G., Salathe, R. P., Everall, L. A., Chisholm, K. E., Williams, J. A. R. & Bennion, I., Jul 1999, In : Journal of Lightwave Technology. 17, 7, p. 1217-1221 5 p.

    Research output: Contribution to journalArticle

    Bragg gratings
    tunable filters
    wavelength division multiplexing
    Wavelength division multiplexing
    Tuning
    Birefringence
    Fiber optics
    birefringence
    fiber optics
    gratings

    Fibre optic bandpass transversal filter employing fibre grating arrays

    Zhang, W. & Williams, J. A. R., 10 Jun 1999, In : Electronics letters. 35, 12, p. 1010-1011 2 p.

    Research output: Contribution to journalArticle

    Transversal filters
    Bandpass filters
    Fiber optics
    Frequency response
    Fibers

    Investigation of H2 in- and out-diffusion impact on long-period grating devices

    Liu, Y., Zhang, L., Zhang, W., Williams, J. A. R. & Bennion, I., May 1999, p. 296-297. 2 p.

    Research output: Contribution to conferenceAbstract

    gratings
    fibers
    spectral sensitivity
    Bragg gratings
    low pressure

    Optical fibre delay line filter free of limitation imposed by optical coherence

    Zhang, W., Williams, J. A. R. & Bennion, I., 25 Nov 1999, In : Electronics letters. 35, 24, p. 2133-2134 2 p.

    Research output: Contribution to journalArticle

    Electric delay lines
    Optical fibers
    Signal processing
    Microwaves
    Fibers

    Recirculating fiber-optic notch filter employing fiber gratings

    Zhang, W., Williams, J. A. R. & Bennion, I., Jul 1999, In : IEEE Photonics Technology Letters. 11, 7, p. 836-838 3 p.

    Research output: Contribution to journalArticle

    Notch filters
    notches
    Fiber optics
    fiber optics
    gratings
    2000

    Evaluation of RF power degradation in microwave photonic systems employing uniform period fibre Bragg gratings

    Yu, G., Zhang, W. & Williams, J. A. R., 15 Apr 2000, In : Optics Communications. 177, 1-6, p. 271-275 5 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    Fiber Bragg gratings
    Photonics
    Bragg gratings
    radio frequencies
    Microwaves

    Fibre Grating Based Optical Recirculating Filter with Optimised Filter Response

    Zhang, W. & Williams, J. A. R., Oct 2000, In : Fiber and Integrated Optics. 19, 4, p. 455-467 13 p.

    Research output: Contribution to journalArticle

    Wave filters
    Optical filters
    optical filters
    gratings
    filters

    Fibre grating DFB laser for generation of optical microwave signal

    Zhang, W., Lai, Y. C., Williams, J. A. R., Lu, C., Zhang, L. & Bennion, I., Jul 2000, In : Optics and Laser Technology. 32, 5, p. 369-371 3 p.

    Research output: Contribution to journalArticle

    Distributed feedback lasers
    Microwaves
    gratings
    microwaves
    fibers

    High-performance microwave transversal filter using fiber Bragg grating arrays

    Yu, G., Zhang, W. & Williams, J. A. R., Sep 2000, In : IEEE Photonics Technology Letters. 12, 9, p. 1183-1185 3 p.

    Research output: Contribution to journalArticle

    Transversal filters
    microwave filters
    Microwave filters
    Fiber Bragg gratings
    Bragg gratings

    Optical Microwave Bandpass Filtering by Using Fiber Bragg Grating Arrays

    Zhang, W., Williams, J. A. R. & Bennion, I., 2000, p. AD2. 8 p.

    Research output: Contribution to conferenceAbstract

    Bragg gratings
    gratings
    microwaves
    fibers
    tunable filters

    Tap multiplexed fibre grating-based optical transversal filter

    Zhang, W., Yu, G. & Williams, J. A. R., 28 Sep 2000, In : Electronics letters. 36, 20, p. 1708-1710 3 p.

    Research output: Contribution to journalArticle

    Transversal filters
    Optical filters
    Photonics
    Fibers
    Multiplexing
    2001

    Bend sensing by measuring the resonance splitting of long-period fiber gratings

    Liu, Y., Zhang, L., Williams, J. A. R. & Bennion, I., 15 Jun 2001, In : Optics Communications. 193, 1-6, p. 69-72 4 p.

    Research output: Contribution to journalArticle

    gratings
    fibers
    Fibers
    Compaction
    curvature

    Optical fiber recirculating delay line incorporating a fiber grating array

    Zhang, W., Williams, J. A. R. & Bennion, I., May 2001, In : IEEE Microwave and Wireless Components Letters. 11, 5, p. 217-219 3 p.

    Research output: Contribution to journalArticle

    Electric delay lines
    delay lines
    Optical fibers
    optical fibers
    gratings

    Optical generation of tunable microwave signal from a dual mode fiber grating DFB laser

    Lai, Y. C., Zhang, W. & Williams, J. A. R., 1 Oct 2001, 2001 International Topical Meeting on Microwave Photonics, MWP 2001. IEEE, Vol. 1. p. 101-103 3 p. 981806. (Techn Digest).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Distributed feedback lasers
    Laser modes
    Linewidth
    Tuning
    Microwaves

    Polarization synthesized optical transversal filter employing high birefringence fiber gratings

    Zhang, W., Williams, J. A. R. & Bennion, I., May 2001, In : IEEE Photonics Technology Letters. 13, 5, p. 523-525 3 p.

    Research output: Contribution to journalArticle

    Transversal filters
    Optical filters
    Diffraction gratings
    optical filters
    Birefringence
    2002

    Abnormal spectral evolution of fiber Bragg gratings in hydrogenated fibers

    Liu, Y., Williams, J. A. R., Zhang, L. & Bennion, I., 15 Apr 2002, In : Optics Letters. 27, 8, p. 586-588 3 p.

    Research output: Contribution to journalArticle

    Open Access
    File
    Bragg gratings
    gratings
    fibers
    shift
    wavelengths

    Accurate differential group delay measurement of narrowband fiber devices with immunity to environmental perturbation

    Lai, Y., Zhang, W., Williams, J. A. R., Sugden, K. & Bennion, I., 2002, 2002 IEEE/ILEOS annual meeting conference proceedings: the 15th annual meeting of the IEEE Lasers & Electro-Optics Society. IEEE, Vol. 2. p. 811-812 2 p. ThUl. (IEEE Lasers and Electro-Optics Society. Annual Meeting).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Group delay
    Fibers
    Phase shift
    Modulation
    Polarization

    All fibre multichannel flattop filter based on coherent fibre delay line structure

    Lai, Y., Zhang, W. & Williams, J. A. R., May 2002, In : Electronics letters. 38, 10, p. 473-475 3 p.

    Research output: Contribution to journalArticle

    Electric delay lines
    Fibers
    Transversal filters
    Light interference
    Birefringence

    A novel all fiber microwave transversal filter with complementary outputs

    Lai, Y., Zhang, W. & Williams, J. A. R., 2002, 2002 International Topical Meeting on Microwave Photonics, MWP 2002 - Technical Digest. IEEE, p. 173-176 4 p. P2-1. (Techincal digest).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Transversal filters
    Microwave filters
    Fibers
    Electric delay lines
    Birefringence

    A novel dual complementary output optical fiber transversal filter for DWDM applications

    Lai, Y., Zhang, W., Williams, J. A. R. & Bennion, I., 2002, 2002 IEEE/ILEOS annual meeting conference proceedings: the 15th annual meeting of the IEEE Lasers & Electro-Optics Society. IEEE, Vol. 2. p. 659-660 2 p. ThEl. (IEEE Lasers and Electro-Optics Society. Annual Meeting).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Transversal filters
    Dense wavelength division multiplexing
    Optical fibers
    Fibers

    Implementation of microwave photonic filtering using a profiled superstructured fiber Bragg grating and dispersive fiber

    Gwandu, B. A. L., Zhang, W. & Williams, J. A. R., 2002, International Topical Meeting on Microwave Photonics 2002. IEEE, p. 113-116 4 p. (Techincal digest).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Bragg gratings
    photonics
    microwaves
    fibers
    taps

    Microwave photonic filtering using Gaussian-profiled superstructured fibre Bragg grating and dispersive fibre

    Gwandu, B. A. L., Zhang, W., Williams, J. A. R., Zhang, L. & Bennion, I., 24 Oct 2002, In : Electronics letters. 38, 22, p. 1328-1330 3 p.

    Research output: Contribution to journalArticle

    Fiber Bragg gratings
    Photonics
    Time delay
    Microwaves
    Fibers

    Microwave photonic response based on nonlinear response of chirped fibre grating

    Lai, Y., Zhang, W. & Williams, J. A. R., 2002.

    Research output: Contribution to conferenceAbstract

    2003

    Analysis of single and multiple, non-permanent, tunable, birefringent spectral holes in a fibre-Bragg grating stop-band produced via uniaxial pressure

    Michaille, L., McCall, M. W., Lai, Y. C. & Williams, J. A. R., Jul 2003, In : Optics Communications. 222, 1-6, p. 1-8 8 p.

    Research output: Contribution to journalArticle

    Fiber Bragg gratings
    Bragg gratings
    fibers
    Birefringence
    gratings

    A nonreciprocal wavelength-interleaving bidirectional coherent fiber transversal filter

    Lai, Y., Zhang, W., Williams, J. A. R. & Bennion, I., Dec 2003, The 5th Pacific Rim Conference on Lasers and Electro-Optics, 2003. CLEO/Pacific Rim 2003. IEEE, Vol. 1. p. 384 1 p. W4J-(8)-3

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Transversal filters
    Chromatic dispersion
    Birefringence
    filters
    Wavelength