Qinduan Zhang

Cite Jump to ExpandCollapse ArticleAugust 21, 2025 GA-HIDMS-PSO-BPNN Model-Based Suppression of Cross-Interference in Absorption Spectra for Dual-Gas Sensing Click to copy article linkArticle link copied! Tingting Zhang Tingting Zhang Shandong Key Laboratory of Optoelectronic Sensing Technologies/National-Local Joint Engineering Laboratory for Energy and Environment Fiber Smart Sensing Technologies, Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014,...

Abstract An intra-cavity quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor using fiber-ring laser is demonstrated. The sensor includes an erbium-doped fiber (EDF) intra-cavity laser and a quartz tuning fork (QTF), and realizes wavelength scanning through a piezoelectric transducer (PZT).

Abstract A highly sensitive and reliable tunable diode laser absorption spectroscopy gas detection system with a temperature–pressure compensation algorithm is demonstrated for detecting ${{\rm CH}_4}$ concentrations in near space. Near space generally refers to the airspace 20–100 km away from the ground, where temperature and pressure changes are complex.