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: In this article, the theory of stimulated Brillouin scattering is applied to the experimental situation of crossed mode-locked laser pulses, centered at the same frequency, in isotropic and anisotropic materials.
Abstract: The theory of stimulated Brillouin scattering is applied to the experimental situation of crossed mode‐locked laser pulses, centered at the same frequency, in isotropic and anisotropic materials. It is shown that generation of pure transverse (shear) ultrasonic waves should be possible with reasonable efficiency. In general, any acoustic phonon mode that the material can support— pure shear, quasishear, quasilongitudinal, and pure longitudinal—can be populated coherently. The results permit straightforward determination of the experimental configuration that most effectively couples laser energy to the desired mode. The acoustic frequency can be tuned conveniently from about 3 MHz to 30 GHz in most materials.
49 citations
TL;DR: In this article, a tellurite glass fiber with a high Brillouin gain was employed for distributed strain measurement with BOCDR, showing a negative dependence with a coefficient of −0.023 MHz/μe.
49 citations
TL;DR: From the threshold values, the Brillouin gain coefficient is estimated and a record figure of merit for slow-light based applications in chalcogenide fibers is demonstrated.
Abstract: Stimulated Brillouin scattering was investigated for the first time in As2S3 single-mode fibers, and also in As2Se3. The propagation loss and numerical aperture of the fibers at 1.56 µm, along with the threshold intensity for the stimulated Brillouin scattering process were measured. From the threshold values we estimate the Brillouin gain coefficient and demonstrate record figure of merit for slow-light based applications in chalcogenide fibers.
49 citations
Patent•
10 Dec 1996TL;DR: In this article, an optical transmitter comprises a first unit for generating an optical signal having a bandwidth given by a main signal, a second unit modulating the optical signal according to a control signal to extend the bandwidth of the optical signals, a third unit extracting backward light including SBS (stimulated Brillouin scattering) light generated in an optical fiber transmission line, and a fourth unit performing feedback control so that the power of the SBS light becomes substantially constant.
Abstract: An optical transmitter comprises a first unit for generating an optical signal having a bandwidth given by a main signal, a second unit modulating the optical signal according to a control signal to extend the bandwidth of the optical signal, a third unit extracting backward light including SBS(stimulated Brillouin scattering) light generated in an optical fiber transmission line, and a fourth unit performing feedback control so that the power of the SBS light becomes substantially constant. Through the structure of the optical transmitter good transmission characteristics of a main signal are obtained and the suppression of the SBS is allowed.
49 citations
TL;DR: In this article, the authors examined the structural relaxation process in poly(propylene glycol) (PPG), molecular weight 10 000, at high frequencies of Brillouin scattering and established the relaxation time τ over a wide timescale of 1-10−11s.
49 citations