A Rayleigh-Brillouin scattering spectrometer for ultraviolet wavelengths

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 titaniu...

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Bibliographic Details
Published inReview of scientific instruments Vol. 83; no. 5; p. 053112
Main Authors Gu, Ziyu, Vieitez, M Ofelia, van Duijn, Eric-Jan, Ubachs, Wim
Format Journal Article
LanguageEnglish
Published United States 01.05.2012
Subjects
Atmospheric Pressure
Gases - chemistry
Scattering, Radiation
Spectrophotometry, Ultraviolet - instrumentation
Temperature
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Summary: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.
ISSN:1089-7623
DOI:10.1063/1.4721272