scispace - formally typeset
Search or ask a question
Topic

Brillouin scattering

About: Brillouin scattering is a research topic. Over the lifetime, 11426 publications have been published within this topic receiving 178306 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, the elasticity of grossular-rich Grs87And9Pyp2Alm2 and almandine-rich Alm72Pyp20Sps3Grs3And2 natural garnet single crystals were determined by Brillouin scattering to 11 GPa in a diamond anvil cell.
Abstract: [1] The high-pressure elasticity of grossular-rich Grs87And9Pyp2Alm2 and almandine-rich Alm72Pyp20Sps3Grs3And2 natural garnet single crystals were determined by Brillouin scattering to 11 GPa in a diamond anvil cell. The experiments were carried out using a 16:3:1 methanol-ethanol water mixture as pressure medium. The aggregate moduli as well as their pressure derivatives were obtained by fitting the data to Eulerian finite strain equations. The inversion yields KS0 = 165.0 ± 0.9 GPa, G0 = 104.2 ± 0.3 GPa, (∂KS/∂P)T0 = 3.8 ± 0.2, and (∂G/∂P)0 = 1.1 ± 0.1 for the grossular-rich composition and KS0 = 174.9 ± 1.6 GPa, G0 = 95.6 ± 0.5 GPa, (∂KS/∂P)T0 = 4.7 ± 0.3, and (∂G/∂P)0 = 1.4 ± 0.1 for the almandine-rich garnet. Both individual and aggregate elastic moduli of the two garnets define nearly linear modulus pressure trends. The elastic anisotropy of the garnets increases weakly in magnitude with compression. Isothermal compression curves derived from our results are generally consistent with static compression data under hydrostatic conditions, and the effects of nonhydrostaticity on previous diffraction data can be identified. The pressure derivatives obtained here are generally lower than those reported in high-pressure polycrystalline ultrasonic elasticity studies. In combination with earlier Brillouin scattering data for pyrope, our results allow us to constrain the effect on elastic moduli of Fe2+-Mg2+ substitution in pyrope-almandine, Ca2+-Mg2+ in pyrope-grossular, and Fe3+-Al3+ substitution in andradite-grossular at high pressures. This new data set thus allows us to place improved constraints on the compositional dependence of seismic velocities in the rocks of the upper mantle.

61 citations

Journal ArticleDOI
TL;DR: A novel frequency-- and wave-number--resolved image of the Thomson-scattered plasma-wave spectrum was used to shed light on the competition between stimulated Raman scattering and stimulated Brillouin scattering.
Abstract: By seeding of an ion wave by means of optical mixing, it was possible totally to suppress stimulated Raman scattering in a laser plasma. A counterpropagating seed beam with 1% of the intensity of the main beam was sufficient. A novel frequency-- and wave-number--resolved image of the Thomson-scattered plasma-wave spectrum was used to shed light on the competition between stimulated Raman scattering and stimulated Brillouin scattering.

61 citations

Journal ArticleDOI
TL;DR: By exploiting the Stokes power dependence, this work can probably solve the problem of how to identify the applied strain, when the identification is difficult only by BFS because of its non-monotonic nature.
Abstract: We investigate the dependence of Brillouin gain spectra on large strain of > 20% in a perfluorinated graded-index polymer optical fiber, and prove, for the first time, that the dependence of Brillouin frequency shift (BFS) is highly non-monotonic. We predict that temperature sensors even with zero strain sensitivity can be implemented by use of this non-monotonic nature. Meanwhile, the Stokes power decreases rapidly when the applied strain is > ~10%. This behavior seems to originate from the propagation loss dependence on large strain. By exploiting the Stokes power dependence, we can probably solve the problem of how to identify the applied strain, when the identification is difficult only by BFS because of its non-monotonic nature.

61 citations

Journal ArticleDOI
TL;DR: A novel method for measuring atmospheric temperature profiles by lidar during daytime for heights of 2-15.3 km, with a vertical resolution of 0.3-2.2 km, using Rayleigh-Brillouin scattering, assuming standard atmospheric pressure conditions.
Abstract: In this Letter, we report on a novel method for measuring atmospheric temperature profiles by lidar during daytime for heights of 2–15.3 km, with a vertical resolution of 0.3–2.2 km, using Rayleigh–Brillouin scattering. The measurements are performed by scanning a laser (λ=355 nm) over a 12 GHz range and using a Fabry–Perot interferometer as discriminator. The temperature is derived by using a new analytical line shape model assuming standard atmospheric pressure conditions. Two exemplary temperature profiles resulting from measurements over 14 and 27 min are shown. A comparison with radiosonde temperature measurements shows reasonable agreement. In cloud-free conditions, the temperature difference reaches up to 5 K within the boundary layer, and is smaller than 2.5 K above. The statistical error of the derived temperatures is between 0.15 and 1.5 K.

61 citations

Journal ArticleDOI
TL;DR: A Brillouin optical frequency-domain reflectometry technique, which can measure the strain and/or temperature along an optical fiber with one-end access, by detecting the spontaneous BrillouIn scattering from a sinusoidally modulated pump light is demonstrated.
Abstract: We demonstrate a Brillouin optical frequency-domain reflectometry (BOFDR) technique, which can measure the strain and/or temperature along an optical fiber with one-end access, by detecting the spontaneous Brillouin scattering from a sinusoidally modulated pump light. Compared to the Brillouin optical frequency-domain analysis (BOFDA), we show that BOFDR measurements are free from the distorting components related to acoustic wave modulation, thus simplifying data processing.

61 citations


Network Information
Related Topics (5)
Optical fiber
167K papers, 1.8M citations
91% related
Laser
353.1K papers, 4.3M citations
88% related
Electric field
87.1K papers, 1.4M citations
86% related
Quantum dot
76.7K papers, 1.9M citations
85% related
Dielectric
169.7K papers, 2.7M citations
85% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023237
2022471
2021289
2020342
2019433
2018404