Remote-sensing gas measurements with coherent Rayleigh-Brillouin scattering
نویسندگان
چکیده
We measure the coherent Rayleigh-Brillouin scattering (CRBS) signal integral as a function of the recorded gas pressure in He, Co2, SF6, and air, and we confirm the already established quadratic dependence of the signal on the gas density. We propose the use of CRBS as an effective diagnostic for the remote measurement of gas’ density (pressure) and temperature, as well as polarizability, for gases of known composition. Published by AIP Publishing. [http://dx.doi.org/10.1063/1.4959778]
منابع مشابه
Novel technique for distributed fibre sensing based on coherent Rayleigh scattering measurements of birefringence
A novel distributed fibre sensing technique is described and experimentally validated, based on birefringence measurements using coherent Rayleigh scattering. It natively provides distributed measurements of temperature and strain with more than an order of magnitude higher sensitivity than Brillouin sensing, and requiring access to a single fibre-end. Unlike the traditional Rayleigh-based cohe...
متن کاملCoherent Rayleigh-brillouin Scattering in Monatomic Gases in the Kinetic Regime
Coherent Rayleigh-Brillouin scattering (CRBS) in krypton at room temperature and moderate pressure has been studied experimentally. The experimental data is in good agreement with the theoretical lineshape developed by the authors. In this paper, we describe the details of the experiment. We also discuss the application of coherent Rayleigh-Brillouin scattering in gas diagnostics.
متن کاملSimultaneous distributed strain and temperature sensing based on combined Raman–Brillouin scattering using Fabry–Perot lasers
An investigation is performed of the possibility of achieving simultaneous distributed strain and temperature sensing based on hybrid Raman–Brillouin scattering with the use of multi-wavelength optical sources such as common Fabry–Perot (FP) lasers. By employing a self-heterodyne detection scheme based on a multi-wavelength optical local oscillator, the benefits of FP lasers are fully exploited...
متن کاملTemperature-strain discrimination in distributed optical fiber sensing using phase-sensitive optical time-domain reflectometry.
A method based on coherent Rayleigh scattering distinctly evaluating temperature and strain is proposed and experimentally demonstrated for distributed optical fiber sensing. Combining conventional phase-sensitive optical time-domain domain reflectometry (ϕOTDR) and ϕOTDR-based birefringence measurements, independent distributed temperature and strain profiles are obtained along a polarization-...
متن کاملCoherent Rayleigh-Brillouin Scattering: Influence of the Intermolecular Potential
The spectrum of the coherent Rayleigh-Brillouin scattering (CRBS) of light by a rarefied gas is obtained by solving the Boltzmann equation numerically using the fast spectral method. The influence of the intermolecular potential on the CRBS spectrum is investigated and the accuracy of the prevailing Tenti’s s6 kinetic model is evaluated. Our numerical results show that i) the intermolecular pot...
متن کامل