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Single-shot single-beam coherent Raman scattering thermometry based on optically induced air lasing

Journal Article (2024)
Author(s)

Xu Lu (Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences)

Yewei Chen (Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences, University of Shanghai for Science and Technology)

Francesco Mazza (TU Delft - Flight Performance and Propulsion)

Siyi He (Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences)

Zihan Li (Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences, University of Shanghai for Science and Technology)

Shunlin Huang (Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences)

Quanjun Wang (Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences)

Ning Zhang (Chinese Academy of Sciences, Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences)

Bo Shen (Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences)

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Research Group
Flight Performance and Propulsion
DOI related publication
https://doi.org/10.1038/s41377-024-01598-9
More Info
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Publication Year
2024
Language
English
Research Group
Flight Performance and Propulsion
Issue number
1
Volume number
13
Article number
315
Downloads counter
157
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Abstract

Thermometric techniques with high accuracy, fast response and ease of implementation are desirable for the study of dynamic combustion environments, transient reacting flows, and non-equilibrium plasmas. Herein, single-shot single-beam coherent Raman scattering (SS-CRS) thermometry is developed, for the first time to our knowledge, by using air lasing as a probe. We show that the air-lasing-assisted CRS signal has a high signal-to-noise ratio enabling single-shot measurements at a 1 kHz repetition rate. The SS-CRS thermometry consistently exhibits precision of <2.3% at different temperatures, but the inaccuracy grows with the increase in temperature. The high measurement repeatability, 1 kHz acquisition rate and easy-to-implement single-beam scheme are achieved thanks to the unique temporal, spectral and spatial characteristics of air lasing. This work opens a novel avenue for high-speed CRS thermometry, holding tremendous potential for fast diagnostics of transient reacting flows and plasmas.