Now showing items 21-32 of 32

  • Real-time edge-enhanced object correlation using incoherent readout of photorefractive BSO 

    Wang, Z. Q.; Soutar, C.; Gillespie, W. A.; Cartwright, Colin M. (Elsevier, 1993)
    Real-time edge-enhanced image correlation using the incoherent readout of a dynamic hologram recorded in BSO crystal is reported for the first time. A system is described which records the Fresnel transform of the input ...
  • Real-time intensity correlation with a synthetic discriminant function filter 

    Wang, Z. Q.; Cartwright, Colin M.; Gillespie, W. A. (Optical Society of America, 1994)
    Real-time optical intensity correlation with a synthetic discriminant function (SDF) filter has been realized. The computed SDF data are fed into an Epson liquid-crystal television to create the optical reference signal. ...
  • Real-time optical intensity correlator using photorefractive BSO and a liquid crystal television 

    Soutar, C.; Wang, Z. Q.; Cartwright, Colin M.; Gillespie, W. A. (Taylor & Francis, 1992)
    We demonstrate the implementation of an optical intensity correlator using Bi12SiO20 (BSO) as a dynamic holographic medium. The advantages of this correlator are large tolerance in the placement of input objects and BSO ...
  • Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection 

    Phillips, P. J.; Gillespie, W. A.; Steffen, B.; Knabbe, E-A.; Schmidt, B.; Schmüser, P.; Jamison, S. P.; Berden, G.; van der Meer, A. F. G.; MacLeod, Allan M. (Joint Accelerator Conferences Website, 2007)
    For the high gain operation of a SASE FEL, extremely short electron bunches are essential to generate sufficiently high peak currents. At the superconducting linac of FLASH at DESY, we have installed an electro- optic ...
  • Single-shot electron-beam bunch length measurements 

    Wilke, I.; MacLeod, Allan M.; Gillespie, W. A.; Berden, G.; Knippels, G. M. H.; van der Meer, A. F. G. (American Physical Society, 2002-03)
    We report subpicosecond electro-optic measurements of the length of individual relativistic electron bunches. The longitudinal electron-bunch shape is encoded electro-optically on to the spectrum of a chirped laser pulse. ...
  • Single-shot longitudinal bunch profile measurements at FLASH using electro-optic detection: Experiment, simulation and validation 

    Steffen, B.; Knabbe, E. A.; Schlarb, H.; Schmidt, B.; Schmuser, P.; Gillespie, W. A.; Phillips, P. J.; Jamison, S. P.; Berden, G.; van der Meer, A. F. G.; MacLeod, Allan M. (Joint Accelerator Conferences Website, 2007)
    At the superconducting linac of FLASH at DESY, we have installed an electro-optic (EO) experiment for singleshot, non-destructive measurements of the longitudinal electric charge distribution of individual electron bunches. ...
  • Single-shot longitudinal bunch profile measurements at FLASH using electro-optic detection: experiment, simulation, and validation. 

    Steffen, B.; Knabbe, E-A.; Schlarb, H.; Schmidt, B.; Schmüser, P.; Gillespie, W. A.; Phillips, P. J.; Jamison, S. P.; Berden, G.; van der Meer, A. F. G.; MacLeod, Allan M. (2007)
    At the superconducting linac of FLASH at DESY, we have installed an electro-optic (EO) experiment for single- shot, non-destructive measurements of the longitudinal electric charge distribution of individual electron ...
  • Temporally resolved electro-optic effect 

    Jamison, S. P.; MacLeod, Allan M.; Berden, G.; Jaroszynski, D. A.; Gillespie, W. A. (Optical Society of America, 2006-06)
    The electro-optic effect between an ultrafast optical probe pulse and an ultrashort terahertz pulse is shown to depend on the time derivatives of the product of the probe and the terahertz electric fields. Application of ...
  • Tracking novelty filter using transient enhancement of gratings in photorefractive BSO 

    Soutar, C.; Cartwright, Colin M.; Gillespie, W. A.; Wang, Z. Q. (Elsevier, 1991-11)
    The operation of novelty filtering is demonstrated using a hybrid optical and digital system. Dynamic gratings are written in photorefractive Bi12SiO20 at 514 nm and read out at 633 nm. The transient properties of the ...
  • An ultrashort pulse ultra-violet radiation undulator source driven by a laser plasma wakefield accelerator 

    Anania, M. P.; Brunetti, E.; Wiggins, S. M.; Grant, D. W.; Welsh, G. H.; Issac, R. C.; Cipiccia, S.; Shanks, R. P.; Manahan, G. G.; Aniculaesei, C.; van der Geer, S. B.; de Loos, M. J.; Poole, M. W.; Shepherd, B. J. A.; Clarke, J. A.; Gillespie, W. A.; MacLeod, Allan M.; Jaroszynski, D. A. (American Institute of Physics (AIP), 2014-06-30)
    Narrow band undulator radiation tuneable over the wavelength range of 150–260 nm has been produced by short electron bunches from a 2 mm long laser plasma wakefield accelerator based on a 20 TW femtosecond laser system. ...
  • Upconversion of a relativistic Coulomb field terahertz pulse to the near infrared 

    Jamison, S. P.; Berden, G.; Phillips, P. J.; Gillespie, W. A.; MacLeod, Allan M. (American Institute of Physics, 2010-06-10)
    We demonstrate the spectral upconversion of a unipolar subpicosecond terahertz (THz) pulse, where the THz pulse is the Coulomb field of a single relativistic electron bunch. The upconversion to the optical allows remotely ...
  • Visual perception of light emitting diode light sources 

    Sharpe, R.; Cartwright, Colin M.; Mather, N.; Gillespie, W. A.; Billen, E.; Wall, C.; Taylor, J. A. F. (Japan Science and Technology Agency, 2003)