Alexey Bunkin - Academia.edu (original) (raw)
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Papers by Alexey Bunkin
Proceedings of SPIE - The International Society for Optical Engineering
ABSTRACT
Laser Physics Letters, 2013
ABSTRACT The Rayleigh resonance in binary solutions was studied by four-wave mixing light scatter... more ABSTRACT The Rayleigh resonance in binary solutions was studied by four-wave mixing light scattering spectroscopy for the first time. A hysteresis-like dependence of the resonance linewidth on the concentration was found.
Laser Physics, 2014
Results of theoretical and experimental investigations of the nonlinear mechanism of Rayleigh-win... more Results of theoretical and experimental investigations of the nonlinear mechanism of Rayleigh-wing formation during the four-wave mixing process in suspensions are presented. The developed theory shows that simultaneous action of two laser radiations with different wavelengths on a spherical particle in a viscous liquid causes a nonlinear resonant response, whose width depends in a complex manner on the particle size, its mechanical properties and the bulk and shear viscosity of the surrounding liquid. The diffusion of particles in a liquid, which depends on several parameters including concentration, leads to concentration dependence of the resonance linewidth observed in the experiment. The four-wave mixing spectroscopy allows us to directly observe nonlinear Rayleigh scattering resonances in the suspensions of spherical nanoparticles whose bandwidth lies in the range from 20 MHz (7 × 10 −4 cm −1 ) to 150 MHz (5 × 10 −3 cm −1 ). These resonances are observed at a high enough level of the detected signal and the signal/noise ratio achieved in the individual measurements is of two orders of magnitude.
Laser Physics, 2013
ABSTRACT A new method of non-linear laser spectroscopy based on four-wave scattering of pump lase... more ABSTRACT A new method of non-linear laser spectroscopy based on four-wave scattering of pump laser radiation into the probe laser cavity is suggested and realized. As a result of intracavity amplification there is an opportunity to investigate weak narrow resonances of different types including the resonances of photo-elastic scattering in optical materials and laser crystals. A theory describing this phenomenon is suggested and experiments with narrowband (1 MHz linewidth) tunable continuous-wave diode laser were carried out. It is shown that the four-wave scattering of pump laser radiation into the cavity of the probe laser can be used for measurement of dispersion of photo-elastic constants in solid and liquid dielectrics.
Journal of Applied Spectroscopy, 1984
Soviet Journal of Quantum Electronics, 1985
An analysis is made of the general case of a nondegenerate system for CARS (coherent anti-Stokes ... more An analysis is made of the general case of a nondegenerate system for CARS (coherent anti-Stokes Raman scattering) spectroscopy in the case of remote measurements. A system of equations is derived for the interacting fields: it allows for stimulated Brillouin scattering and for enhancement of pump radiation by stimulated Raman scattering. The constant field approximation and realistic experimental conditions are used in estimating the magnitude of the signal which should be observed.
Soviet Journal of Quantum Electronics, 1988
An analysis is made of the polarization interaction of laser radiation with stimulated Raman scat... more An analysis is made of the polarization interaction of laser radiation with stimulated Raman scattering and stimulated Brillouin scattering (STBS) waves in Raman- and STBS-active media.
Journal of Modern Optics
ABSTRACT
Proceedings of SPIE - The International Society for Optical Engineering
ABSTRACT
Proceedings of SPIE - The International Society for Optical Engineering
ABSTRACT
Laser Physics Letters, 2013
ABSTRACT The Rayleigh resonance in binary solutions was studied by four-wave mixing light scatter... more ABSTRACT The Rayleigh resonance in binary solutions was studied by four-wave mixing light scattering spectroscopy for the first time. A hysteresis-like dependence of the resonance linewidth on the concentration was found.
Laser Physics, 2014
Results of theoretical and experimental investigations of the nonlinear mechanism of Rayleigh-win... more Results of theoretical and experimental investigations of the nonlinear mechanism of Rayleigh-wing formation during the four-wave mixing process in suspensions are presented. The developed theory shows that simultaneous action of two laser radiations with different wavelengths on a spherical particle in a viscous liquid causes a nonlinear resonant response, whose width depends in a complex manner on the particle size, its mechanical properties and the bulk and shear viscosity of the surrounding liquid. The diffusion of particles in a liquid, which depends on several parameters including concentration, leads to concentration dependence of the resonance linewidth observed in the experiment. The four-wave mixing spectroscopy allows us to directly observe nonlinear Rayleigh scattering resonances in the suspensions of spherical nanoparticles whose bandwidth lies in the range from 20 MHz (7 × 10 −4 cm −1 ) to 150 MHz (5 × 10 −3 cm −1 ). These resonances are observed at a high enough level of the detected signal and the signal/noise ratio achieved in the individual measurements is of two orders of magnitude.
Laser Physics, 2013
ABSTRACT A new method of non-linear laser spectroscopy based on four-wave scattering of pump lase... more ABSTRACT A new method of non-linear laser spectroscopy based on four-wave scattering of pump laser radiation into the probe laser cavity is suggested and realized. As a result of intracavity amplification there is an opportunity to investigate weak narrow resonances of different types including the resonances of photo-elastic scattering in optical materials and laser crystals. A theory describing this phenomenon is suggested and experiments with narrowband (1 MHz linewidth) tunable continuous-wave diode laser were carried out. It is shown that the four-wave scattering of pump laser radiation into the cavity of the probe laser can be used for measurement of dispersion of photo-elastic constants in solid and liquid dielectrics.
Journal of Applied Spectroscopy, 1984
Soviet Journal of Quantum Electronics, 1985
An analysis is made of the general case of a nondegenerate system for CARS (coherent anti-Stokes ... more An analysis is made of the general case of a nondegenerate system for CARS (coherent anti-Stokes Raman scattering) spectroscopy in the case of remote measurements. A system of equations is derived for the interacting fields: it allows for stimulated Brillouin scattering and for enhancement of pump radiation by stimulated Raman scattering. The constant field approximation and realistic experimental conditions are used in estimating the magnitude of the signal which should be observed.
Soviet Journal of Quantum Electronics, 1988
An analysis is made of the polarization interaction of laser radiation with stimulated Raman scat... more An analysis is made of the polarization interaction of laser radiation with stimulated Raman scattering and stimulated Brillouin scattering (STBS) waves in Raman- and STBS-active media.
Journal of Modern Optics
ABSTRACT
Proceedings of SPIE - The International Society for Optical Engineering
ABSTRACT