A Rayleigh-Brillouin scattering spectrometer for ultraviolet wavelengths

被引：22
作者：
Gu, Ziyu [1 ]
Vieitez, M. Ofelia [1 ]
van Duijn, Eric-Jan [1 ]
Ubachs, Wim [1 ]
机构：
[1] Vrije Univ Amsterdam, Inst Lasers Life & BioPhoton, NL-1081 HV Amsterdam, Netherlands
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2012年 / 83卷 / 05期
关键词：
LIGHT; GASES; SPECTROSCOPY; SPECTRUM; NITROGEN; LASERS; NE; HE;
D O I：
10.1063/1.4721272
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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 degrees C to 70 degrees C. A scannable Fabry-Perot analyzer with instrument resolution of 232 MHz probes the RB profiles. Measurements on N-2 and SF6 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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4721272]
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页数：7
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