Demonstration of a Rayleigh–Brillouin scattering spectrometer with a high spectral resolution for rapid gas temperature detection

Hongda Yan, Tao Wu*, Sihao Pi, Qiang Wu, Chenwen Ye, Xingdao He

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A novel, to the best of our knowledge, Rayleigh–Brillouin scattering (RBS) spectrometer based on a virtually imaged phased array (VIPA) with a high spectral resolution is proposed for rapid gas temperature detection. CO 2 RBS spectra at gas pressure of 0.5–4 bar were acquired with a spectrum acquisition time of 10 s, and temperature inversion analysis was performed using TENTI S6 model. The root-mean-square error (RMSE) of the RBS profile fitting is less than 2.95%, and the maximum absolute error of temperature inversion is less than 2.45 K. Compared with traditional methods, this method has low RBS signal loss and short acquisition time without the frequency scanning process, which is more conducive to real-time detection applications.

Original languageEnglish
Pages (from-to)5931-5934
Number of pages4
JournalOptics Letters
Issue number22
Early online date7 Nov 2023
Publication statusPublished - 15 Nov 2023

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