The coherent scattering of photon in the Coulomb field (the Delbrück scattering) is considered for the momentum transfer ∆ ≪ m in the frame of the quasiclassical operator method. In high-energy region this process occurs over rather long distance. The process amplitude is calculated taking into account the multiple scattering of particles of the intermediate electron-positron pair in a medium. ...

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Coherent Rayleigh-Brillouin scattering (CRBS) in krypton at room temperature and moderate pressure has been studied experimentally. The experimental data is in good agreement with the theoretical lineshape developed by the authors. In this paper, we describe the details of the experiment. We also discuss the application of coherent Rayleigh-Brillouin scattering in gas diagnostics.

Sarah A. Tedder , Jeffrey L. Wheeler, and Paul M. Danehy Advanced Sensing and Optical Measurement Branch, NASA Langley Research Center, 18 Langley Boulevard, Hampton, Virginia 23681-2199, USA Department of Physics, The College of William & Mary, P.O. Box 8795, Williamsburg, Virginia, 23187-8795, USA Whitworth University, 300 W. Hawthorne Road, Spokane, Washington, 99251-2515, USA Corresponding ...

[i] We examine the relative importance of coherent and incoherent echo components in near-nadir radar scattering from self-affme surfaces. The coherent component, important only for observations at small incidence angles (nadir-looking sounders and altimeters), is a function of both surface roughness and scattering area. Models for the incoherent component require a minimum scattering area for ...

Performing label free coherent anti-Stokes Raman scattering (CARS) and stimulated Raman scattering (SRS) in endoscope imaging is a challenge, with huge potential clinical benefit. To date, this goal has remained inaccessible because of the inherent coherent Raman noise that is generated in the fiber itself. By developing double-clad hollow core photonic crystal fiber, we demonstrate coherent an...

Recently, dual wavelength radar measurements of smoke and developing cumulus clouds have appeared in the literature which show a puzzling correlation between the measured radar returns. This correlation cannot easily be explained in terms of the conventional scattering mechanisms: coherent (Bragg) scattering from spatial fluctuations in clear-air refractive index and incoherent (Rayleigh) scatt...