In a two-level system that is subjected to a resonant coherent pump, an extraresonance that resembles stimulated Rayleigh scattering takes place when the pump reaches a moderate intensity. In addition to the major features obtained in pressure-induced extraresonance, this scattering is also verified as a field-induced extra-resonance. A nonlinear power-induced decay rate was found and is predicted to give new features of the extraresonance in the gain and in the line shape. Because of the existence of this decay, Lorentzian-shaped contribution to the gain, in addition to the well-known dispersive one, was found. These effects are especially pronounced in a dephasing mechanism and may produce an extraresonance with a frequency shift that is considerably larger than that of the conventional pressure-induced one.In a two-level system that is subjected to a resonant coherent pump, an extraresonance that resembles stimulated Rayleigh scattering takes place when the pump reaches a moderate intensity. In addition to the major features obtained in pressure-induced extraresonance, this scattering is also verified as a field-induced extra-resonance. A nonlinear power-induced decay rate was found and is predicted to give new features of the extraresonance in the gain and in the line shape. Because of the existence of this decay, Lorentzian-shaped contribution to the gain, in addition to the well-known dispersive one, was found. These effects are especially pronounced in a dephasing mechanism and may produce an extraresonance with a frequency shift that is considerably larger than that of the conventional pressure-induced one.

Journal of the Optical Society of America BNov 1, 19902 citations

Stimulated Rayleigh-Brillouin gain spectroscopy

C. Y. She, G. C. Herring, Hans Moosmüller +1 more

Steady-state stimulated Rayleigh-Brillouin gain spectroscopy and its application are reported. The stimulated gain, which is derived in terms of the spectral function of density fluctuations, is shown to approach, in the limit of zero density, the gain derived from the individual-particle picture of Rayleigh scattering. Using a pulsed pump laser, experimental gain spectra of pure ${\mathrm{SF}}_{6}$ , pure Ar, and a ${\mathrm{SF}}_{6}$ - and He-gas mixture are obtained and explained. Other associated coherent Rayleigh-Brillouin spectroscopies and the possibility of using a cw pump laser for higher spectral resolution are discussed.Steady-state stimulated Rayleigh-Brillouin gain spectroscopy and its application are reported. The stimulated gain, which is derived in terms of the spectral function of density fluctuations, is shown to approach, in the limit of zero density, the gain derived from the individual-particle picture of Rayleigh scattering. Using a pulsed pump laser, experimental gain spectra of pure ${\mathrm{SF}}_{6}$, pure Ar, and a ${\mathrm{SF}}_{6}$- and He-gas mixture are obtained and explained. Other associated coherent Rayleigh-Brillouin spectroscopies and the possibility of using a cw pump laser for higher spectral resolution are discussed.

Physical Review AJun 1, 198526 citations

Stimulated Rayleigh Resonances and Recoil-Induced Effects

J.-Y. Courtois, G. Grynberg

Advances in atomic, molecular, and optical physicsJan 1, 199610 citations

Optical Switching by Stimulated Thermal Rayleigh Scattering

Lauren M. Peterson

Abstract : Preliminary experiments were conducted whose ultimate goal is to develop all-optical control functions useful in an all-optical or optical- electronic hybrid digital computer or for optical interconnects. Stimulated thermal Rayleigh scattering (STRS) based upon generator experiments was pursued for scattering angles of 90 deg and 180 deg (backscattering). A pulsed nitrogen laser pumped dye laser served as the radiation source and the interaction medium was a liquid to which an absorbing dye was added. STRS amplifier experiments were successful and gain was observed and studied parametrically using eosine dye in ethanol. The gain was found to increase (although the gain coefficient decreased) with increasing pump power and the gain was found to be a maximum at an absorption coefficient of about 2.6 per cm. The generator experiments did not lead to stimulated scattering due to the limited output power of the laser and its multi-longitudinal spectral mode content. These studies will be continued along with analytical modeling in order to characterize the interaction and to enable the optimization of the scattering process.Abstract : Preliminary experiments were conducted whose ultimate goal is to develop all-optical control functions useful in an all-optical or optical- electronic hybrid digital computer or for optical interconnects. Stimulated thermal Rayleigh scattering (STRS) based upon generator experiments was pursued for scattering angles of 90 deg and 180 deg (backscattering). A pulsed nitrogen laser pumped dye laser served as the radiation source and the interaction medium was a liquid to which an absorbing dye was added. STRS amplifier experiments were successful and gain was observed and studied parametrically using eosine dye in ethanol. The gain was found to increase (although the gain coefficient decreased) with increasing pump power and the gain was found to be a maximum at an absorption coefficient of about 2.6 per cm. The generator experiments did not lead to stimulated scattering due to the limited output power of the laser and its multi-longitudinal spectral mode content. These studies will be continued along with analytical modeling in order to characterize the interaction and to enable the optimization of the scattering process.

Jun 1, 19860 citations

{\mathrm{SF}}_{6}

, pure Ar, and a

{\mathrm{SF}}_{6}

- and He-gas mixture are obtained and explained. Other associated coherent Rayleigh-Brillouin spectroscopies and the possibility of using a cw pump laser for higher spectral resolution are discussed.