aqora

Laser-induced nonlinear resonances in the continuum at third-harmonic generation in Na vapor

Stefan Dimov, Lubomir I. Pavlov, K. V. Stamenov +2 more

Applied Physics BJan 1, 198343 citations

Controlling cascade third-order and fifth-order nonlinear optical processes via atomic coherence

Zheng Zheng, Zhang, Xiao Xiao

Conference on Lasers and Electro-OpticsJan 1, 20100 citations

Electron stimulated Raman scattering and four-wave interaction in barium atomic vapor pumped by tunable ultrashort light pulses

S O Sapondzhyan, David G. Sarkisyan, G. Torosyan

A phosphate neodymium glass laser emitting picosecond pulses tunable in the 1.05–1.07 μ range was developed to study nonlinear optical processes in atomic barium vapor. Its temporal characteristics were investigated using a modified second harmonic beam method. Electron stimulated Raman scattering and four-photon parametric conversion in atomic barium vapor were used to obtain efficient conversion of the third harmonic of the picosecond phosphate laser (350–356 nm) to the Stokes (580–600 nm) and anti-Stokes (250–253 nm) waves. The highest conversion quantum efficiency for the Stokes wave was 15%. Electron stimulated Raman scattering in an (6 s 2 ) 1 S –(6 s 7 s ) 1 S –(6 s 6 p ) 1 P 0 system, having a strongly forbidden first transition, was recorded for the first time. In the same system, two-photon pumping generated four-photon parametric superradiance and it was found that the signal and idler waves had anomalously broad spectra (wider than 100 cm −1 ).A phosphate neodymium glass laser emitting picosecond pulses tunable in the 1.05–1.07 μ range was developed to study nonlinear optical processes in atomic barium vapor. Its temporal characteristics were investigated using a modified second harmonic beam method. Electron stimulated Raman scattering and four-photon parametric conversion in atomic barium vapor were used to obtain efficient conversion of the third harmonic of the picosecond phosphate laser (350–356 nm) to the Stokes (580–600 nm) and anti-Stokes (250–253 nm) waves. The highest conversion quantum efficiency for the Stokes wave was 15%. Electron stimulated Raman scattering in an (6 s 2 ) 1 S –(6 s 7 s ) 1 S –(6 s 6 p ) 1 P 0 system, having a strongly forbidden first transition, was recorded for the first time. In the same system, two-photon pumping generated four-photon parametric superradiance and it was found that the signal and idler waves had anomalously broad spectra (wider than 100 cm −1 ).

Soviet Journal of Quantum ElectronicsMay 31, 19854 citations

Nonlinear magneto-optical effects in Ba vapor

Aleksandr Khanbekyan, Irina V. Novikova, George R. Welch

The European Physical Journal DOct 1, 20124 citations

Nonlinear Optical Phenomena in Atoms

С. А. Бахрамов

Jan 1, 19980 citations

Induced autoionization-like resonances in nonlinear third- and fifth-order susceptibilities of sodium vapor

Stefan Dimov, Lubomir I. Pavlov, Yu. I. Geller +1 more

A study was made of the influence of autoionization-like resonances in the continuum, induced by strong optical radiation, on the nonlinear susceptibilities governing third harmonic generation and the optical activity of sodium vapor. It was demonstrated experimentally for the first time that it should be possible to study high-lying states of atoms and molecules by the method of nonlinear polarization spectroscopy of the fifth-order optical nonlinearity. The experimental results were compared with the theory. An analysis was made of the feasibility of using this effect for spectroscopy of the states in the continuum and for generation of short-wavelength radiation in gaseous media.A study was made of the influence of autoionization-like resonances in the continuum, induced by strong optical radiation, on the nonlinear susceptibilities governing third harmonic generation and the optical activity of sodium vapor. It was demonstrated experimentally for the first time that it should be possible to study high-lying states of atoms and molecules by the method of nonlinear polarization spectroscopy of the fifth-order optical nonlinearity. The experimental results were compared with the theory. An analysis was made of the feasibility of using this effect for spectroscopy of the states in the continuum and for generation of short-wavelength radiation in gaseous media.

Soviet Journal of Quantum ElectronicsAug 31, 19834 citations

Interference in third-order nonlinear optical processes on third-harmonic generation in barium vapor

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Interference in third-order nonlinear optical processes on third-harmonic generation in barium vapor

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