Results 211 to 220 of about 38,600 (257)
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Four-wave mixing with femtosecond pulses
Physica Scripta, 2009The recent development of noncollinear optical parametric amplifiers (NOPAs) has equipped many laboratories with widely tunable, spectrally broad ultrashort laser pulses with a duration of 15-30 fs. The present work deals with sub-20 fs pulsed degenerate four wave mixing (DFWM) on high-frequency vibrational levels in all-trans-beta-carotene.
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Symmetries of photorefractive four-wave mixing
Physical Review A, 1992A symmetry analysis of degenerate four-wave-mixing equations in photorefractive crystals is carried out. Using underlying SU symmetries, a systematic derivation of conserved quantities is performed, and a method of integration of the equations is introduced.
, Stojkov, , Belic
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Squeezing in nondegenerate four-wave mixing
Physical Review A, 1986Ways to minimize spontaneous-emission noise due to quantum fluctuations in the medium are a major consideration in experiments designed to produce squeezed states of light. Motivated by the recent experiments of Slusher et al. we present a fully quantized model of nondegenerate four-wave mixing. We show that the spontaneous-emission noise, important at
Reid, M. D., Walls, D. F.
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Four-wave mixing in microstructure fiber
Optics Letters, 2001We report what we believe to be the first experimental demonstration of nondegenerate four-wave mixing in a microstructure fiber. The effect of the chi((3)) nonlinearity is enhanced in such a fiber because of the small core area, and we achieve phase matching by operating near the zero-dispersion wavelength (?750 nm) . We have observed parametric gains
J E, Sharping +4 more
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Four-Wave Frequency Mixing in Gases
1987Four wave frequency mixing in gases is now understood in a quantitative manner and has been used for the design of coherent infrared as well as vacuum uv sources. A brief review of the fundamental processes is given. The vacuum uv sources have already extended laser spectroscopy into the vacuum ultraviolet spectral region below 200 nm. Several examples
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Four-wave mixing with matter waves
Nature, 1999The advent of the laser as an intense source of coherent light gave rise to nonlinear optics, which now plays an important role in many areas of science and technology. One of the first applications of nonlinear optics was the multi-wave mixing1,2 of several optical fields in a nonlinear medium (one in which the refractive index depends on the ...
L. Deng +9 more
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Nondegenerate Four-Wave Mixing in CuCl
International Conference on Luminescence - 1984, 1984See TuG7 for summary.
R. Levy, F. Tomasini, J.B. Grun
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Four-wave mixing and six-wave mixing in a four-level confined atomic system
Chinese Physics B, 2009We have investigated coexisting four-wave mixing and six-wave mixing (SWM) in ultra-thin, micrometre and long vapour cells. There exists competition between Dicke-narrowing features and polarization interference in the micrometre cell. The oscillation behaviour of SWM signal intensities and linewidths results from destructive interference.
Li Chang-Biao +7 more
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Four-Wave Mixing in Metamaterials
Russian Physics Journal, 2018Interaction of four counterpropagating waves in a cubic medium being “left” for the signal wave is considered in the constant-intensity approximation. Analytical expression for the signal wave intensity is derived for the general case of four-wave interaction in a metamaterial.
R. J. Kasumova +3 more
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Instabilities In Four-Wave Mixing
SPIE Proceedings, 1986Recent research on instabilites in the four-wave mixing process is summarized. The four-wave mixing process can cause a laser beam to become unstable to the growth of new frequency components as the beam propagates through a nonlinear medium. Similar instabilities can occur in more complicated optical systems such as lasers and bistable optical devices.
Robert W. Boyd +4 more
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