Temperature dependence of threshold and gain coefficient of stimulated Brillouin scattering in water

Shi, Jiulin; Tang, Yongqiang; Wei, Hongjun; Zhang, Lei; Zhang, Dong; Shi, Jianzhong; Gong, Wei; He, Xingdao; Yang, Kecheng; Liu, Dahe

doi:10.1007/s00340-012-5142-2

Cited by 30 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This would significantly limit the competition from SBS, with SRS then appearing much more efficient in the conversion process. 34,35) These points were verified by an experiment in which the energies of SBS and SRS were measured in distilled water and MgSO 4 saturated aqueous solution, as a function of incident pump energy. The results of this experiment are presented in Fig.…”

mentioning

confidence: 74%

Higher-order stimulated Raman scattering in an aqueous solution of magnesium sulfate pumped by 532 nm laser pulses

Yang

Cao

Shi

et al. 2016

Appl. Phys. Express

Self Cite

View full text Add to dashboard Cite

We report on the generation of higher-order stimulated Raman scattering (SRS) in a saturated aqueous solution of MgSO4, pumped by a 532 nm frequency-doubled Nd:YAG laser operating with multiple longitudinal modes. The first- (∼561.4 nm), second- (∼594 nm), and third-order (∼630 nm) Stokes components of SRS were observed, and were attributed to the symmetric vibrations of the [SO4] tetrahedral structural groups. Two possible physical mechanisms for generating higher-order SRS were analyzed. The results point to an efficient method for generating new laser wavelengths from a liquid blended media system through a higher-order nonlinear SRS process.

show abstract

mentioning

confidence: 74%

Higher-order stimulated Raman scattering in an aqueous solution of magnesium sulfate pumped by 532 nm laser pulses

Yang

Cao

Shi

et al. 2016

Appl. Phys. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…An RBS spectrum consists of two dominant components: the Rayleigh part due to thermal motion of the gas molecules, which causes a Doppler shift relative to the incident wavelength, and the Brillouin part, which is due to the exchange of energy between light and acoustic modes in the medium and is associated with the acoustic effect of gas molecules [46]. Rayleigh-Brillouin scattering is nowadays a powerful method to investigate thermodynamic properties of transparent media such as gas, water and optical fibers [47][48][49][50][51][52][53][54]. RBS is used to determine the physical properties of gases, such as sound speed, thermal diffusivity, heat capacity ratios, bulk viscosity, etc [46].…”

Section: Application To the Rayleigh-brillouin Light Scattering Expermentioning

confidence: 99%

Recasting Navier–Stokes equations

et al. 2019

View full text Add to dashboard Cite

Classical Navier-Stokes equations fail to describe some flows in both the compressible and incompressible configurations. In this article, we propose a new methodology based on transforming the fluid mass velocity vector field to obtain a new class of continuum models. We uncover a class of continuum models which we call the re-casted Navier-Stokes. They naturally exhibit the physics of previously proposed models by different authors to substitute the original Navier-Stokes equations. The new models unlike the conventional Navier-Stokes appear as more complete forms of mass diffusion type continuum flow equations. They also form systematically a class of thermomechanically consistent hydrodynamic equations via the original equations. The plane wave analysis is performed to check their linear stability under small perturbations, which confirms that all re-casted models are spatially and temporally stable like their classical counterpart. We then use the Rayleigh-Brillouin scattering experiments to demonstrate that the re-casted equations may be better suited for explaining some of the experimental data where original Navier-Stokes equations fail.Öttinger [11] also proposed earlier a substitute for the classical Navier-Stokes in his phenomenological GENERIC formalism. In the GENERIC formulation, Öttinger [11] demonstrated that by assuming the row and the column, which are associated with the mass density in the friction matrix to be identically zero, leads to the conventional Navier-Stokes equations. A more general form of friction matrix that includes the basic fact that particles operate diffusive motions, leads to a revised set of transport equations that contain two velocities, which are very similar in nature to the volume and mass velocities. Durst et al [12] based their arguments on that the absence of mass diffusion terms in the continuity equation contradicts constitutive relations for momentum and heat diffusion: when the fluid properties changes spatially in the presence of momentum and heat diffusions, there should also be present the mass diffusion. They later derived the Extended Navier-Stokes equations [12,13,17] based on the mass-diffusion controlled formalism. A late suggestion to substitute the Navier-Stokes is given by Svärd [18].Generally, there are a number of experimental data that standard Navier-Stokes fail to predict. Shock wave structure predictions are a ubiquitous example of Navier-Stokes failure [4,6,19,20]. Experimental data of water flows in carbon nanotubes or confined pores is another research topic showing large deviations from the classical Hagen-Poiseuille equation [21,22]. A convincing theoretical interpretation of this data is still lacking. Leaving aside non-linear configurations, conventional Navier-Stokes equations also fail to describe some of the linear flow problems accurately. For example, it is unsuccessful in describing the actual spectrum shapes in the Rayleigh-Brillouin scattering problem [23][24][25][26][27][28].In the current work, we provide new insights into the ...

show abstract

“…In contrast, UV-VIS-NIR (in wavelengths 670 and 455 nm) combined with stimulated Brillouin scattering (SBS) achieved to detect olive oil adulteration (Shi et al, 2019). SBS is an inelastic dispersion process that is presented by the fluctuation of the density of the acoustic sources in the medium, which allows to relate it to the properties of the density and refractive index (Shi et al, 2012). These olive oil properties change with adulteration with other oils, and can be used as an efficient method to separate between pure and adulterated samples.…”

Section: Vegetable Oilmentioning

confidence: 99%

Trends in application of NIR and hyperspectral imaging for food authentication

Mendez¹,

Mendoza²,

Cruz-Tirado³

et al. 2019

Sci.agropecu

View full text Add to dashboard Cite

Food fraud can cause damage to consumer health and affect their confidence, destroy brands and generate large economic losses in the industry. Food authenticity allows to identify if food composition, geographical origin, genetic variety and farming system corresponds to what has been declared on the label. Although there are currently standardized methods to identify certain adulterants, the complexity of the food, the complexity of the supply chain and the appearance of new adulterants require the continuous development of analytical techniques to detect food fraud. NIR and Hyperspectral imaging (HSI) in tandem with chemometrics are non-destructive, non-invasive and accurate techniques for food authentication. This review focuses on NIR and HIS approaches to food authentication, including adulteration by substitution, geographical origin and farming system. In this context, the advances in NIR and HSI approaches reported since 2014 are discussed regarding their potential use in food authentication. Both techniques have shown to have efficiency, precision and selectivity to detect adulterants and identify geographic origin, genetic variety and farming system. Portability and remote access are shown as the next step for the industrialization of NIR and HSI devices.

show abstract

Temperature dependence of threshold and gain coefficient of stimulated Brillouin scattering in water

Cited by 30 publications

References 20 publications

Higher-order stimulated Raman scattering in an aqueous solution of magnesium sulfate pumped by 532 nm laser pulses

Higher-order stimulated Raman scattering in an aqueous solution of magnesium sulfate pumped by 532 nm laser pulses

Recasting Navier–Stokes equations

Trends in application of NIR and hyperspectral imaging for food authentication

Contact Info

Product

Resources

About