Ultra-highly sensitive dual gases detection based on photoacoustic spectroscopy by exploiting a long-wave,high-power,wide-tunable,singlelongitudinal-mode solid-state laser  

作　　者：Shunda Qiao Ying He Haiyue Sun Pietro Patimisco Angelo Sampaolo Vincenzo Spagnolo Yufei Ma 

机构地区：[1]National Key Laboratory of Laser Spatial Information,Harbin Institute of Technology,Harbin,China [2]PolySense Lab,Dipartimento Interateneo di Fisica,University and Politecnico of Bari,Via Amendola,Bari,Italy

出　　处：《Light(Science & Applications)》2024年第5期941-956,共16页光（科学与应用)（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.62335006,62022032,62275065,and 61875047);Key Laboratory of Opto-Electronic Information Acquisition and Manipulation(Anhui University),Ministry of Education(Grant No.OEIAM202202);Fundamental Research Funds for the Central Universities(Grant No.HIT.OCEF.2023011).

摘　　要：Photoacoustic spectroscopy(PAS)as a highly sensitive and selective trace gas detection technique has extremely broad application in many fields.However,the laser sources currently used in PAS limit the sensing performance.Compared to diode laser and quantum cascade laser,the solid-state laser has the merits of high optical power,excellent beam quality,and wide tuning range.Here we present a long-wave,high-power,wide-tunable,singlelongitudinal-mode solid-state laser used as light source in a PAS sensor for trace gas detection.The self-built solid-state laser had an emission wavelength of~2μm with Tm:YAP crystal as the gain material,with an excellent wavelength and optical power stability as well as a high beam quality.The wide wavelength tuning range of 9.44 nm covers the absorption spectra of water and ammonia,with a maximum optical power of~130 mW,allowing dual gas detection with a single laser source.The solid-state laser was used as light source in three different photoacoustic detection techniques:standard PAS with microphone,and external-and intra-cavity quartz-enhanced photoacoustic spectroscopy(QEPAS),proving that solid-state laser is an attractive excitation source in photoacoustic spectroscopy.

关 键 词：power TUNABLE tuning 

分 类 号：TN248[电子电信—物理电子学]