Highly sensitive laser spectroscopy sensing based on a novel four-prong quartz tuning fork
简介：In this paper,a novel four-prong quartz tuning fork(QTF)was designed with enlarged deformation area,large prong gap,and low resonant frequency to improve its performance in laser spectroscopy sensing.A theoretical simulation model was established to optimize the design of the QTF structure.In the simulation of quartz-enhanced photoacoustic spec-troscopy(QEPAS)technology,the maximum stress and the surface charge density of the four-prong QTF demonstrated increases of 11.1-fold and 15.9-fold,respectively,compared to that of the standard two-prong QTF.In the simulation of light-induced thermoelastic spectroscopy(LITES)technology,the surface temperature difference of the four-prong QTF was found to be 11.4 times greater than that of the standard QTF.Experimental results indicated that the C2H2-QEPAS system based on this innovative design improved the signal-to-noise-ratio(SNR)by 4.67 times compared with the stan-dard QTF-based system,and the SNR could increase up to 147.72 times when the four-prong QTF was equipped with its optimal acoustic micro-resonator(AmR).When the average time of the system reached 370 s,the system achieved a MDL as low as 21 ppb.The four-prong QTF-based C2H2-LITES system exhibited a SNR improvement by a factor of 4.52,and a MDL of 96 ppb was obtained when the average time of the system reached 100 s.The theoretical and exper-imental results effectively demonstrated the superiority of the four-prong QTF in the field of laser spectroscopy sensing.展开
学者：RunqiuWangShundaQIAOYingHeYufeiMa
关键词：four-prong quartz tuning forkC2H2 detectionquartz-enhanced photoacoustic spectroscopylight-induced thermoelastic spectroscopy
在线出版日期：2025-07-10 （网站首发日期）
