Bessel Beam Coherent Anti-Stokes Raman Scattering Spectroscopy for Turbulent Flow Diagnosis

被引：1

作者：

Li, Runfeng ^{[1
,2
,3
]}

Lan, Ruijun ^{[4
]}

Dong, Dashan ^{[1
,2
,5
]}

Yang, Hong ^{[1
,2
,6
]}

Shi, Kebin ^{[1
,2
,3
,6
]}

机构：

[1] Peking Univ, State Key Lab Mesoscop Phys, Sch Phys, Beijing, Peoples R China

[2] Peking Univ, Frontiers Sci Ctr Nanooptoelect, Sch Phys, Beijing, Peoples R China

[3] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan, Shanxi, Peoples R China

[4] Yantai Univ, Sch Phys & Elect Informat, Yantai 264005, Peoples R China

[5] Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China

[6] Peking Univ, Yangtze Delta Inst Optoelect, Nantong, Jiangsu, Peoples R China

来源：

APPLIED SPECTROSCOPY | 2023年 / 77卷 / 03期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Coherent anti-Stokes Raman scattering; CARS; Bessel beam; spectroscopy; turbulent flow; TEMPERATURE-MEASUREMENTS; VIBRATIONAL DYNAMICS; FEMTOSECOND-CARS; FS-CARS; THERMOMETRY; WATER;

D O I：

10.1177/00037028221136124

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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.

引用

页码：303 / 307

页数：5

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