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 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.
Institute for Lasers, Life and BioPhotonics, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
Ziyu
Z
Gu
M Ofelia
MO
Vieitez
Eric-Jan
EJ
van Duijn
Wim
W
Ubachs
D001274:Atmospheric Pressure; D005740:Gases / Q000737:chemistry; D012542:Scattering, Radiation; D013056:Spectrophotometry, Ultraviolet / Q000295:instrumentation*; D013696:Temperature
D005740:Gases