2012/05/01 by Ziyu Gu, M. Ofelia Vieitez, M. O. Vieitez +3 · 22 citations
Chemistry · Engineering · Mathematics · Physics and Astronomy · #Brillouin scattering #Gas Dynamics and Kinetic Theory #Laser #Laser Design and Applications #Light scattering #Materials science #Optics #Optoelectronics #Photodiode #Physics #Raman scattering #Raman spectroscopy #Rayleigh scattering #Scattering #Spectrometer #Spectroscopy and Laser Applications #Ultraviolet #Wavelength #physics.ao-ph #physics.optics
paper · pdf · doi:10.1063/1.4721272
published in Review of Scientific Instruments 83(5), 053112 (American Institute of Physics) · 8 double column pages, 9 figures
openalex publication_date 2012/05/01 · arxiv created 2012/10/05 · arxiv updated 2012/10/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A spectrometer for the measurement of spontaneous Rayleigh-Brillouin (RB) scattering line profiles at ultraviolet wavelengths from gas phase molecules has been developed, employing a high-power frequency-stabilized UV-laser with narrow bandwidth (2 MHz). The UV-light from a frequency-doubled titanium:sapphire laser is further amplified in an enhancement cavity, delivering a 5 W UV-beam propagating through the interaction region inside a scattering cell. The design of the RB-scattering cell allows for measurements at gas pressures in the range 0-4 bars and at stably controlled temperatures from -30 °C to 70 °C. A scannable Fabry-Perot analyzer with instrument resolution of 232 MHz probes the RB profiles. Measurements on N(2) and SF(6) gases demonstrate that the high signal-to-noise ratio is achievable with the instrument at the 1% level at the peak amplitude of the scattering profile.