Presentations

    Fourier transform heterodyne spectroscopy: a simple novel technique with ultrahigh (150 mHz) resolution, at EICOLS '87 Conference (Åre, Sweden), Monday, June 1, 1987
    Light beating spectroscopy has been used from the early days of the laser to study light scattering. By detecting the beating signal between the scattered light and a 'local oscillator' field derived from the same laser, resolving powers of 10^14 have been achieved. The Fourier transform heterodyne spectroscopy presented here is simpler and more direct than the conventional heterodyne techniques using autocorrelators or spectrum analyzers.
    Light scattering from nonequilibrium liquid interfaces, at Tenth Symposium on Thermophysical Properties (Gaithersburg, MD), Wednesday, June 1, 1988
    The asymmetry of the two Brillouin peaks of light scattered from capillary waves on a water-nitrogen interface subject to a temperature gradient has been observed using a Fourier transform heterodyne technique. The local oscillator is frequency-shifted by a few kHz to separate the Stokes and anti-Stokes components. Although the sign and the order of magnitude of the effect agree with linear theory, the magnitude of the experimental asymmetry is about one half of the one predicted by linear fluctuating hydrodynamics.
    Fourier transform heterodyne spectroscopy of liquid interfaces, at Conference on Laser Materials and Laser Spectroscopy '88 (Shanghai, People's Republic of China), Friday, July 1, 1988
    By acousto-optically shifting the local oscillator in a heterodyne set-up, a spectral resolution of better than 150 mHz can be obtained. Applications of the technique to the study of interfacial phenomena are discussed.
    MilliHertz Surface Spectroscopy, at Ninth International Conference on Laser Spectroscopy (Bretton Woods, NH), Thursday, June 1, 1989
    A technique that has been repeatedly employed in high resolution light scattering experiments is that of light beating, or heterodyne, spectroscopy. By detecting the beating signal between the scattered light and a 'local oscillator' derived from the same laser source, one can obtain ultrahigh spectral resolution, independent of the random fluctuations of the light source. We reported earlier of a novel Fourier transform heterodyne spectroscopy (FTHS) technique with high resolution which is simpler and more direct than the conventional heterodyne technique; we have since improved our... Read more about MilliHertz Surface Spectroscopy

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