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 full theoretical representation of BLS eigenmode spectra of polymer and silica colloids resolves a longstanding discussion showing that both even and odd l spheroidal modes are active.
Abstract: Brillouin light scattering (BLS) can record particle resonances, which allow access to thermomechanical properties on a submicrometer scale. The full theoretical representation of BLS eigenmode spectra of polymer and silica colloids resolves a longstanding discussion showing that both even and odd l spheroidal modes are active. The BLS spectra of transparent silica suspensions fully support the predicted dependence of the strength of the individual resonance modes on the probing wavevector. It is this dependence that selects which spheroidal modes will be revealed experimentally.
44 citations
TL;DR: In this article, the authors theoretically and experimentally investigate the transient stimulated Brillouin scattering (SBS) in a single-mode fiber and demonstrate that SBS can occur even in the nanosecond region.
Abstract: We theoretically and experimentally investigate the transient stimulated Brillouin scattering (SBS) in a single-mode fiber. The experiment was conducted using a single-mode pulsed YAG laser and demonstrates that SBS can occur even in the nanosecond region. Due to the transient nature of SBS, pulse narrowing of the transmitted pulse is observed. The experimental results agree with the theory based on the coupled-amplitude equations for the pump, Stokes, and acoustic waves. The steady-state solution of SBS is obtained when the pulse width of the incident pulse is one 100-fold greater than the round-trip time within the fiber. We show that the instability of SBS depends on the magnitude of the nonlinear refractive index of the fiber. SBS instability behavior appears at different pump power levels when the nonlinear refractive index is an order of magnitude larger than that of the fused-silica fiber.
43 citations
43 citations
TL;DR: In this paper, the spectral width of the source was analyzed and it was found that addition of spectral width in the source lowers the SBS effect, which could transmit more optical power in a single channel and maintain high OSNR.
43 citations
TL;DR: In this paper, a novel technique for controlling the bandwidth of a fiber Brillouin amplifier is proposed and demonstrated using a frequency-modulated pump laser, in this case an external-cavity semiconductor laser.
Abstract: A novel technique for controlling the bandwidth of a fibre Brillouin amplifier is proposed and demonstrated. By using a frequency-modulated pump laser, in this case an external-cavity semiconductor laser, we have increased the bandwidth of useful gain by more than one order of magnitude. The scheme can be used to tailor the gain characteristics of fibre Brillouin amplifiers to
43 citations