Shen Xiaowen, Zhang Yixin, Cui Ruyue, Tian Donghe, Cheng Ming, Patimisco Pietro, Sampaolo Angelo, Sun Chaofeng, Yin Xukun, Spagnolo Vincenzo, Dong Lei, Wu Hongpeng
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, PR China.
Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, PR China.
Photoacoustics. 2025 Feb 18;42:100702. doi: 10.1016/j.pacs.2025.100702. eCollection 2025 Apr.
A ppb-level sulfur dioxide (SO) monitoring platform was developed by exploiting standard photoacoustic spectroscopy and a novel, highly stable UV laser. A 266.22 nm LD-pumped solid-state, acousto-optic modulator Q-switched laser with high beam quality (M =1.0275) and excellent output optical power stability (δ ˂ 1 % ∼24 h) was selected as light source of the photoacoustic sensor. The performance of the SO sensor was evaluated in terms of gas flow rate, pressure, and detection sensitivity. An ultimate detection limit of 3 ppb for SO detection in N was demonstrated with 1 s integration time, in laboratory environment. Continuous outdoor monitoring for five days verified the excellent stability and reliability of the reported SO photoacoustic sensor.
通过利用标准光声光谱和一种新型的、高度稳定的紫外激光器，开发了一种用于监测十亿分之一级二氧化硫（SO）的平台。选择了一台波长为266.22 nm的LD泵浦固态声光调制器调Q激光器作为光声传感器的光源，该激光器具有高光束质量（M =1.0275）和出色的输出光功率稳定性（δ ˂ 1 % ∼24 h）。从气体流速、压力和检测灵敏度方面对SO传感器的性能进行了评估。在实验室环境中，1秒积分时间下，该传感器对氮气中SO的检测极限达到了3 ppb。连续五天的户外监测验证了所报道的SO光声传感器具有出色的稳定性和可靠性。
