Bessel Beam Coherent Anti-Stokes Raman Scattering Spectroscopy for Turbulent Flow Diagnosis. Issue 3 (March 2023)

• Record Type: Journal Article
• Authors: Li, Runfeng; Lan, Ruijun; Dong, Dashan; Yang, Hong; Shi, Kebin
• Is Part Of: Applied spectroscopy. Volume 77:Issue 3(2023)
• Page Start: 303
• Page End: 307
• Publication Date: 2023-03
• Subjects: Coherent anti-Stokes Raman scattering -- CARS -- Bessel beam -- spectroscopy -- turbulent flow; Spectrum analysis -- Periodicals; 543.505
• DOI: 10.1177/00037028221136124
• Languages: English
• ISSNs: 0003-7028

Abstract

Coherent anti-Stokes Raman scattering (CARS) spectroscopy plays an important role in chemical analysis for transient flow dynamics. Due to the turbulent ambient conditions, the CARS spectrum often suffers from a poor signal-to-noise ratio (SNR) and cannot provide a convincing measurement. Here, we report on a CARS spectroscopic method using a Bessel beam to enhance the spectral fidelity and SNR in a quasi-turbulent environment. Compared with traditional CARS, the measurement accuracy is significantly improved by taking advantage of the anti-scattering and self-healing characteristics of the Bessel beam. Our preliminary results indicate that Bessel beam CARS could be a promising method for high precision turbulent flow measurement fields. Graphical Abstract