Results 271 to 280 of about 7,929 (304)
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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 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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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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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 solitons in stimulated Raman scattering
Physical Review A, 1989, MacPherson, , Swanson, , Carlsten
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Spontaneous Raman Scattering from Shocked Water
Physical Review Letters, 1985, Holmes, , Nellis, , Graham, , Walrafen
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1976
Active spectroscopy of Raman scattering (ASRS) which has been rapidly developing for the last 2–3 years, is an intermediate between the technique of spontaneous and stimulated Raman scattering (RS) of light; it combines wide spectroscopic applicability of the first method with such advantages of the second one as high scattering efficiency, strong ...
S. A. Akhmanov, N. I. Koroteev
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Active spectroscopy of Raman scattering (ASRS) which has been rapidly developing for the last 2–3 years, is an intermediate between the technique of spontaneous and stimulated Raman scattering (RS) of light; it combines wide spectroscopic applicability of the first method with such advantages of the second one as high scattering efficiency, strong ...
S. A. Akhmanov, N. I. Koroteev
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