High-resolution four-photon intracavity laser spectroscopy with the external phase conjugation mirror

Бункин, А. Ф.; Davydov, M. A.; Ivochkin, A. Yu.; Першин, С. М.

doi:10.3103/s1541308x11040042

Cited by 4 publications

(8 citation statements)

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“…Expression (5) implies that the account for reverse radiation impact of the sound wave in liquid on ball pulsation leads as expected to the frequency dependence of pulsation amplitude which, in the case of small viscous decay, has a quasi-Lorentz form.…”

Section: Theorymentioning

confidence: 89%

“…The scheme of the experimental setup that was described in detail earlier [5] is presented in figure 1. Radiation of two identical extended cavity diode lasers (wavelength λ = 794.7 nm, linewidth ∼ 1 MHz, output power-up to 50 mW, frequency tuning range ∼ 30 GHz, linear polarization) is focused using spherical mirrors (radius R = 1 m) into a quartz cell K with the suspension under investigation.…”

Section: Methodsmentioning

confidence: 99%

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High-resolution four-wave mixing spectroscopy of suspensions: the nonlinear mechanism of a Rayleigh-wing formation

Бункин¹,

Davydov²,

Ivochkin³

et al. 2013

Laser Phys.

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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.

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Section: Theorymentioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

High-resolution four-wave mixing spectroscopy of suspensions: the nonlinear mechanism of a Rayleigh-wing formation

Бункин¹,

Davydov²,

Ivochkin³

et al. 2013

Laser Phys.

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mentioning

confidence: 95%

“…Previously, we reported the observation of a four-photon signal of Rayleigh scattering of diode laser radiation in a number of materials [1][2][3]. In this case, the scattering signal results from the interaction of radiation of a probe laser with a three-dimensional diffraction grating induced in a medium under interference of probe laser and pump radiations.…”

mentioning

confidence: 95%

“…However, the formation of the observed scattering signal in the nonlinear interaction of low-power laser radiation on cubic nonlinearity was not completely understood. The objective of this research is to determine the role of regenerative amplification of the scattering signal in one of the lasers in the geometry of the interaction of opposite light beams [1][2][3].The schematic of the experimental setup is shown in Fig. 1.…”

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confidence: 99%

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Regenerative amplification of the central component of the Rayleigh line in liquid

Davydov

Першин

2014

Bull. Lebedev Phys. Inst.

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It is shown that the Rayleigh scattering signal excited in liquid during four-wave mixing of radiation of diode laser whose frequency difference is tuned in the vicinity of small detunings is amplified in the active element of the probe laser.Keywords: four-photon scattering, wave matching, Rayleigh line.Previously, we reported the observation of a four-photon signal of Rayleigh scattering of diode laser radiation in a number of materials [1][2][3]. In this case, the scattering signal results from the interaction of radiation of a probe laser with a three-dimensional diffraction grating induced in a medium under interference of probe laser and pump radiations. Probe radiation scattering on the refractive index grating forms the signal carrying information about components of the nonlinear susceptibility tensor of a medium χ 3 (see, e.g., [4] and references therein). A change in the frequency difference of the probe and pump lasers causes a change in the four-wave mixing signal intensity. In the general case, there is the Rayleigh line in the region of small frequency detunings (see e.g., [5]). Its width in a singlecomponent medium is inversely proportional to the anisotropy relaxation time. However, the formation of the observed scattering signal in the nonlinear interaction of low-power laser radiation on cubic nonlinearity was not completely understood. The objective of this research is to determine the role of regenerative amplification of the scattering signal in one of the lasers in the geometry of the interaction of opposite light beams [1][2][3].The schematic of the experimental setup is shown in Fig. 1. Radiation of two ILVR-1 semiconductor lasers (the emission linewidth is ∼1 MHz, the frequency tuning range is ∼30 GHz, the power is P ∼50 mW, polarization is linear, about 99%) was directed towards each other and converged by an additional diaphragm ∼50 μm in diameter at an angle of ∼179.2 − 179.3 • in a cell with a material under study (chemically pure ethanol or acetone in the case at hand). For the purpose of spatial filtering of laser radiation using plane mirrors, the optical path (the distance from lasers to cell) was increased to ∼7-8 m.In the beam of pump laser L1, Faraday isolator (FI) for decoupling the laser and scattering volume K, and quarter-wave plate P for converting linear polarization of pump radiation into circular polarization were installed. The pump beam is focused into cell K by spherical mirror M1 (of radius R = 1000 mm, the reflectance is r = 99.6%). Pump radiation passed through the cell is blocked by darkened metal screen S. Probe laser L2 radiation was focused into cell K by mirror M2 (of radius R = 1000 mm, the reflectance is r = 90%) toward the beam of pump laser L1. Probe laser radiation passed through diaphragm D1, polarization analyzer A1 (Glan prism) crossed with the polarization direction of the probe laser beam and arrived at photodetector Ph1 (FEU-79 photomultiplier). Thus, the signal detected by Ph1 represented a depolarized fraction of probe laser radiation (which is ...

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Four-wave mixing spectroscopy of the photo-elastic scattering resonance in Nd:YVO₄crystal

Бункин¹,

Davydov²,

Ivochkin³

et al. 2012

Laser Phys.

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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.

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High-resolution four-photon intracavity laser spectroscopy with the external phase conjugation mirror

Cited by 4 publications

References 2 publications

High-resolution four-wave mixing spectroscopy of suspensions: the nonlinear mechanism of a Rayleigh-wing formation

High-resolution four-wave mixing spectroscopy of suspensions: the nonlinear mechanism of a Rayleigh-wing formation

Regenerative amplification of the central component of the Rayleigh line in liquid

Four-wave mixing spectroscopy of the photo-elastic scattering resonance in Nd:YVO₄crystal

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High-resolution four-photon intracavity laser spectroscopy with the external phase conjugation mirror

Cited by 4 publications

References 2 publications

High-resolution four-wave mixing spectroscopy of suspensions: the nonlinear mechanism of a Rayleigh-wing formation

High-resolution four-wave mixing spectroscopy of suspensions: the nonlinear mechanism of a Rayleigh-wing formation

Regenerative amplification of the central component of the Rayleigh line in liquid

Four-wave mixing spectroscopy of the photo-elastic scattering resonance in Nd:YVO4crystal

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Product

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Four-wave mixing spectroscopy of the photo-elastic scattering resonance in Nd:YVO₄crystal