{"title":"Trace molecular detection with wavelength-modulated cavity-enhanced two-photon absorption spectroscopy","authors":"Yu-Zhong Liu, Wen-Tao Cai, Yan-Dong Tan, Tian-Peng Hua, Cun-Feng Cheng, Shui-Ming Hu","doi":"10.1007/s00340-025-08463-6","DOIUrl":null,"url":null,"abstract":"<div><p>Sensitive detection of trace gas molecules is critically important for various scientific and industrial applications. We present a wavelength-modulated cavity-enhanced two-photon absorption spectroscopy (WM-CETPAS) technique that integrates the Doppler-free precision of two-photon absorption with the noise suppression capability of wavelength modulation. This approach achieves both high sensitivity and high selectivity in molecular detection. As a demonstration, we measured <span>\\(^{13}\\)</span>CO<span>\\(_2\\)</span> in gas mixtures, confirming that the WM-CETPAS method enables real-time detection without interference from other molecular species. The method provides an opportunity to be a powerful tool for various applications, such as isotope analysis, environmental monitoring, and industrial process control.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 5","pages":""},"PeriodicalIF":2.0000,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Physics B","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1007/s00340-025-08463-6","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Sensitive detection of trace gas molecules is critically important for various scientific and industrial applications. We present a wavelength-modulated cavity-enhanced two-photon absorption spectroscopy (WM-CETPAS) technique that integrates the Doppler-free precision of two-photon absorption with the noise suppression capability of wavelength modulation. This approach achieves both high sensitivity and high selectivity in molecular detection. As a demonstration, we measured \(^{13}\)CO\(_2\) in gas mixtures, confirming that the WM-CETPAS method enables real-time detection without interference from other molecular species. The method provides an opportunity to be a powerful tool for various applications, such as isotope analysis, environmental monitoring, and industrial process control.
微量气体分子的灵敏检测对于各种科学和工业应用至关重要。提出了一种波长调制腔增强双光子吸收光谱（WM-CETPAS）技术，该技术将双光子吸收的无多普勒精度与波长调制的噪声抑制能力相结合。该方法在分子检测中具有高灵敏度和高选择性。作为演示，我们测量了气体混合物中的\(^{13}\) CO \(_2\)，证实了WM-CETPAS方法能够在不受其他分子物种干扰的情况下进行实时检测。该方法为同位素分析、环境监测和工业过程控制等各种应用提供了一个强大的工具。
期刊介绍：
Features publication of experimental and theoretical investigations in applied physics
Offers invited reviews in addition to regular papers
Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more
94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again
Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field.
In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
