Results 241 to 250 of about 41,207 (287)

Spontaneous-Raman-Scattering Efficiency and Stimulated Scattering in Silicon

Physical Review B, 1970
The absolute spontaneous-Raman-scattering efficiency and linewidth of the 521-${\mathrm{cm}}^{\ensuremath{-}1}$ optical mode of silicon have been measured at 77 K using a continuous laser (Nd in yttrium aluminum garnet) operating at 1.064 \ensuremath{\mu}m.
J. M. Ralston, R. K. Chang
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Spontaneous Raman scattering in atomic thallium vapor

Physics Letters A, 1973
Abstract Using a cw argon-ion laser, we have measured the spontaneous Raman scattering cross section, σ R , and linewidth in atomic thallium vapor. For 4880-A excitation, σ R = 1.6 × 10 −27 cm 2 . We observe no pressure broadening of the Raman line at vapor pressures to 100 torr.
A. Flusberg, R.A. Weingarten, S.R. Hartmann   +2 more
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Phenomenological model of spontaneous Raman scattering

Optics Communications, 1981
Abstract We re-examine the phenomenological interpretation of near-resonant Raman scattering as being due to the finite life-time of the intermediate states. We show that sufficiently close to resonance this interpretation leads to a cross section which is in exact agreement with the predictions of QED, even when Zeeman degeneracy is taken into ...
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Unified theory of spontaneous and stimulated rotational Raman scattering

Physical Review A, 1990
A general analytic theory of spontaneous and stimulated rotational Raman scattering is presented. This analytic description incorporates arbitrary polarization, time dependence, phase matching, and parametric coupling of the pump, Stokes, and anti-Stokes fields and the degeneracy of the rotational states. The analytic expressions for the time-dependent
, Hermann, , Chambers, , Dixit, , Karr
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Spontaneous Raman Scattering in Suspended InGaAsP Waveguides

Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009
We demonstrate the spontaneous Raman effect in suspended InGaAsP waveguides and report that the zinc blende Raman selection rules are relaxed in the waveguide geometry.
S. A. Holmstrom, T. H. Stievater, M. W. Pruessner, W. S. Rabinovich, S. Kanakaraju, L. C. Calhoun, J. B. Khurgin, D. P. Kelly, R. Ghodssi   +8 more
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Short-time squeezing in spontaneous Raman and stimulated Raman scattering

Quantum and Semiclassical Optics: Journal of the European Optical Society Part B, 1995
The non-classical effect of squeezing of light in spontaneous Raman and stimulated Raman processes are investigated under a short-time approximation based on a fully quantum mechanical approach. A Raman process is looked upon as a two-photon and one-phonon interaction process.
A Kumar, P S Gupta
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Amplified spontaneous Raman scattering and gain in fiber Raman amplifiers

Journal of Lightwave Technology, 1985
The spectrum of amplified spontaneous Raman scattering and gain in a fiber Raman amplifer has been calculated analytically as a function of distance and pump power. The model used makes no assumptions on the magnitude of the gain and considers the pump nondepletion region.
M. Dakss, P. Melman
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Raman scattering in spontaneously modulated materials

AIP Conference Proceedings, 1979
Structures that spontaneously modulate via a displacive phase transition may be studied by Raman scattering, for there is always one fully symmetric, Raman‐active mode in the new phase not present above the transition. The number and symmetry of such new modes depend on the symmetry of the modulated structure, allowing Raman measurements to verify and ...
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Dynamics of polynucleotide/solvent interaction with spontaneous Raman scattering

SPIE Proceedings, 1994
Isotropic and Anisotropic Raman spectra of RNA and DNA solutions have been obtained with a scanning monochromator system. The registration of the spectra was optimized for the special purpose of extracting bandwidth information and the non-coincidence effect. The following polynucleotides were selected: poly(rA) poly(rU) , poly(rA) . poly(rU) , poly(rk-
Otto, Cornelis, Terpstra, P.A., Greve, Jan   +2 more
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Experimental study of transient spontaneous Raman scattering

Annual Meeting Optical Society of America, 1989
The quantum nature of the source of stimulated Raman scattering and its effect on the output of Raman self-generators have been investigated in a number of studies.1 Quantum theories of stimulated Raman scattering predict that its source is equivalent to spontaneous Raman scattering.
M. D. Duncan, J. Reintjes, R. Mahon, Law Rence L. Tankersley   +3 more
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