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  1. Article

    Open Access

    Stress- and Temperature-Dependent Wideband Fluorescence of a Phosphor Composite for Sensing Applications

    As both stress and temperature can alter the lattice of a solid phosphor in a similar way, the dopant rare-earth ion may be used as a probe for either parameter using the same sensing mechanism. Here, a wideba...

    W. Zhang, Z. Li, G. W. Baxter, S. F. Collins in Experimental Mechanics (2017)

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  2. No Access

    Article

    The temperature of a vibrated granular gas

    The temperature of a granular medium is defined, in a manner analogous to that of a molecular gas, as the root mean squared kinetic energy of the grains. Using a novel two-layer granular experiment, we have ma...

    G. W. Baxter, J. S. Olafsen in Granular Matter (2007)

  3. No Access

    Article

    Tunable single-frequency ultraviolet generation from a continuous-wave Ti : sapphire laser with an intracavity PPLN frequency doubler

    We report a single-longitudinal-mode continuous-wave Ti : sapphire ring laser that is intracavity frequency doubled in periodically poled lithium niobate (PPLN). Using a multi-grating PPLN crystal, the second ...

    R.T. White, I.T. McKinnie, S.D. Butterworth, G.W. Baxter… in Applied Physics B (2003)

  4. Article

    Gaussian statistics in granular gases

    A kinetic theory1,2 of granular media, analogous to that described by Maxwell–Boltzmann statistics for molecular gases and liquids3,4, has long been sought in the quest for a continuum theory. Here we present res...

    G. W. Baxter, J. S. Olafsen in Nature (2003)

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  5. No Access

    Article

    A quadrature rule for the finite Hilbert transform via trapezoid type inequalities

    A quadrature rule for the finite Hilbert Transform via trapezoid type inequalities is obtained. Some numerical experiments for different divisions of the interval [a, b] are also presented.

    N. M. Dragomir, S. S. Dragomir… in Journal of Applied Mathematics and Computi… (2003)

  6. No Access

    Article

    Spectroscopic diagnostics of chemical processes: applications of tunable optical parametric oscillators

    Optical parametric oscillator (OPO) and amplifier (OPA) devices are useful for spectroscopic sensing of chemical processes in laboratory, industrial, and environmental settings. This is particularly true of na...

    G.W. Baxter, M.A. Payne, B.D.W. Austin, C.A. Halloway, J.G. Haub… in Applied Physics B (2000)

  7. No Access

    Article

    Efficient, single frequency, high repetition rate, PPLN OPO pumped by a prelase Q-switched diode-pumped Nd:YAG laser

    Single axial mode operation (<200 MHz optical bandwidth) of a high repetition rate periodically poled lithium niobate optical parametric oscillator (OPO) has been obtained at signal wavelengths between 1.46 μm...

    G.W. Baxter, P. Schlup, I.T. McKinnie in Applied Physics B (2000)

  8. No Access

    Article

    A pulsed optical parametric oscillator, based on periodically poled lithium niobate (PPLN), for high-resolution spectroscopy

    ), approaching the limit imposed by the Fourier transform of the pulse duration.

    G.W. Baxter, Y. He, B.J. Orr in Applied Physics B (1998)

  9. No Access

    Article

    Laser spectroscopy with a pulsed, narrowband infrared optical parametric oscillator system: a practical, modular approach

    in a single scan. The potential of the OPO system for linear and nonlinear-optical spectroscopy is demonstrated by recording high-resolution photoacoustic absorption and coherent anti-Stokes Raman spectra of ...

    G.W. Baxter, H.-D. Barth, B.J. Orr in Applied Physics B (1998)

  10. No Access

    Chapter and Conference Paper

    Pattern Formation and Time-Dependence in Flowing Sand

    We describe three experiments characterizing the dynamics of sand flowing from a hopper. In the first experiment, we have measured time-dependence in the normal stress caused by sand flowing from a hopper in o...

    G. W. Baxter, R. P. Behringer, T. Fagert, G. A. Johnson in Two Phase Flows and Waves (1990)

  11. No Access

    Chapter and Conference Paper

    An Overview of the Flow Regimes in a Circular Couette System

    The flow of a fluid between concentric rotating cylinders constitutes one of the simplest situations for studying the formation of nonequilibrium structures, both static and time-dependent, that one could imag...

    C. D. Andereck, G. W. Baxter in Propagation in Systems Far from Equilibrium (1988)