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Phenomenological model of spontaneous Raman scattering
Optics Communications, 1981Abstract 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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Spontaneous Raman scattering in atomic thallium vapor
Physics Letters A, 1973Abstract 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 +2 more
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Raman scattering in spontaneously modulated materials
AIP Conference Proceedings, 1979Structures 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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Spontaneous Raman Scattering in Suspended InGaAsP Waveguides
Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009We 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 +8 more
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Experimental study of transient spontaneous Raman scattering
Annual Meeting Optical Society of America, 1989The 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 +3 more
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Spontaneous Raman scattering in a silicon wire waveguide
Optical Amplifiers and Their Applications/Integrated Photonics Research, 2004We report spontaneous Raman scattering at 1550nm in an SOI strip waveguide with cross-sectional area 0.1µm2. The tight optical confinement permits efficient Raman conversion for small coupled pump powers (1435nm) of
Jerry I. Dadap +4 more
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Physical Review A, 1996
The amplification of a visible laser-diode beam in a gain-guided, multipass Raman amplifier is studied as a function of laser-diode and pump-laser powers. At a relatively high laser-diode power (178 nW) the amplified output grows as a simple exponential from very low gains to amplifier saturation.
, Wessel, , Repasky, , Carlsten
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The amplification of a visible laser-diode beam in a gain-guided, multipass Raman amplifier is studied as a function of laser-diode and pump-laser powers. At a relatively high laser-diode power (178 nW) the amplified output grows as a simple exponential from very low gains to amplifier saturation.
, Wessel, , Repasky, , Carlsten
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Journal of Physics D: Applied Physics, 2014
The paper provides an overview of the use of coherent anti-Stokes Raman scattering (CARS) and spontaneous Raman scattering for diagnostics of low-temperature nonequilibrium plasmas and nonequilibrium high-enthalpy flows. A brief review of the theoretical background of CARS, four-wave mixing and Raman scattering, as well as a discussion of experimental ...
Walter R. Lempert, Igor V. Adamovich
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The paper provides an overview of the use of coherent anti-Stokes Raman scattering (CARS) and spontaneous Raman scattering for diagnostics of low-temperature nonequilibrium plasmas and nonequilibrium high-enthalpy flows. A brief review of the theoretical background of CARS, four-wave mixing and Raman scattering, as well as a discussion of experimental ...
Walter R. Lempert, Igor V. Adamovich
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Simultaneous measurement of spontaneous and stimulated Raman scattering in optical fibers
SPIE Proceedings, 2004The Raman gain spectrum of Phosphorous-doped optical fibers (PDF) is known to exhibit, in addition to the pure silica response, a strong 40 THz frequency-shifted Stokes peak relative to the pump. This large shift reduces the number of cascades required in Raman lasers using nested cavities.
Eric Saulnier +2 more
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Spontaneous Raman Scattering for Gas Phase Diagnostics
MRS Proceedings, 1988AbstractThe use of spontaneous rotational and vibrational Raman scattering for nonperturbing measurements of temperature and gas phase concentrations in combustion and in materials processing is reviewed. Theory of Raman intensities is briefly discussed and examples of Raman scattering from metal halide vapors in high temperature furnaces, laminar ...
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