Techniques to enhance the photoacoustic signal for trace gas sensing: A review

• Published in: Sensors and actuators. A. Physical. Vol. 345; p. 113807
• Main Authors: Wang, Fupeng, Cheng, Yaopeng, Xue, Qingsheng, Wang, Qiang, Liang, Rui, Wu, Jinghua, Sun, Jiachen, Zhu, Cunguang, Li, Qian
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.10.2022; Elsevier BV
• Subjects: Acoustic absorption; Acoustic waves; Cantilever; Custom tuning fork; EDFA; Fiber optics; Fiber-optic microphone; Gas detectors; Gas sensors; Optical communication; Photoacoustic enhancement; Photoacoustic spectroscopy; Resonator; Surface acoustic waves; Trace gases; Transducers; CRDS; Resonator; PAS; EDFL; FLI-PAS; FBG; PZT; Photoacoustic spectroscopy; Cantilever; CEPAS; TDLAS; ASE; Photoacoustic enhancement; MDL; SNR; EC-PAS; QEPAS; IC-PAS; Fiber-optic microphone; EDFA; Custom tuning fork; NDIR; WMS; RAM

Photoacoustic spectroscopy (PAS), which relies on the detection of absorption-induced acoustic waves, is widely used for gas sensing. This paper summarizes and discusses most of the recent techniques for photoacoustic enhancement throughout the overall process from laser-molecule interaction to acou...