Topic
Brillouin scattering
About: Brillouin scattering is a research topic. Over the lifetime, 11426 publications have been published within this topic receiving 178306 citations.
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TL;DR: Several resonance peaks owing to an interaction between light-wave and guided modes of longitudinal acoustic waves are observed in the Brillouin gain spectra for a single-mode fiber with a GeO2-doped core and pure silica cladding.
Abstract: Several resonance peaks owing to an interaction between light-wave and guided modes of longitudinal acoustic waves are observed in the Brillouin gain spectra for a single-mode fiber with a GeO2-doped core and pure silica cladding. Brillouin gain spectra measurements are carried out at 1286- and 1550-nm wavelengths. Longitudinal acoustic modes guided in the GeO2-doped core region are identified by applying the analysis of leaky modes in a fiber acoustic waveguide.
75 citations
TL;DR: The generation of microwave and millimeter-wave frequencies from 26 to 100 GHz is demonstrated by heterodyning the output modes of a dual-wavelength fiber laser based on stimulated Brillouin scattering by exploiting potential for operation into the terahertz regime.
Abstract: We demonstrate the generation of microwave and millimeter-wave frequencies from 26 to 100 GHz by heterodyning the output modes of a dual-wavelength fiber laser based on stimulated Brillouin scattering. The output frequency is tunable in steps of 10.3 MHz, equal to the free spectral range of the resonator. The noise properties of the beat frequency indicate a microwave linewidth of <2 Hz. We discuss potential for operation into the terahertz regime.
75 citations
TL;DR: In this paper, the authors applied simultaneous phase modulation to the two pump waves so that stimulated Brillouin scattering is suppressed without affecting the generated idler wave, and the signal light was converted from an arbitrary wavelength to another arbitrary one within the entire C-band.
Abstract: Highly efficient tunable wavelength conversion based on nondegenerate fiber four-wave mixing is demonstrated. We apply simultaneous phase modulation to the two pump waves so that stimulated Brillouin scattering is suppressed without affecting the generated idler wave. The signal light is converted from an arbitrary wavelength to another arbitrary one within the entire C-band with a conversion efficiency higher than -10 dB.
75 citations
TL;DR: In this article, the glass transition temperature (Tg) in thin free-standing polymer films of polystyrene (PS) was measured by means of confocal Raman spectroscopy.
Abstract: We report measurements of the glass transition temperature (Tg) in thin free-standing polymer films of polystyrene (PS) by means of confocal Raman spectroscopy. The paper introduces Raman spectroscopy as a novel method for the determination of Tg in polymer thin films. We find excellent agreement between Raman scattering and previously reported values of Tg obtained from either Brillouin scattering or ellipsometry. Further possible applications of the method to more complex conjugated polymers are briefly discussed.
74 citations
TL;DR: In this article, a real-time data source for sound speed in the upper 100 m has been proposed for exploratory development at the Naval Oceanographic and Atmospheric Research Laboratory (NOARL).
74 citations