Single off-beam exciting dual-quartz-tuning-fork resonance-enhanced QEPAS trace gas sensing
Year: 2025
Type: article
Abstract: In this Letter, a quartz-enhanced photoacoustic spectroscopy (QEPAS) gas sensor based on a single off-beam acoustic micro-resonator (AmR) and dual quartz tuning forks (QTFs) was demonstrated for the first time, to our knowledge.The sensor offers advantages of a compact sensing structure and high acoustic energy utilization efficiency.The key parameters of the designed off-beam AmR were optimized based on standing wave enhancement characteristics.Water vapor (H 2 O) in the environment was chosen as the target gas to investigate the sensor performance.Under identical experimental conditions, the reported sensor achieved 15.02 times improvement in detection sensitivity compared to the bare QTF-based sensor system, as well as a 1.53 times enhancement over the traditional off-beam QEPAS technique.
Source: Chinese Optics Letters
Authors: Bangyu Liu, Shunda Qiao, Ying He, Yufei Ma
Institution: Harbin Institute of Technology
Language: English
Subfield: Spectroscopy
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4414676079