title: Double acoustic microresonator quartz-enhanced photoacoustic spectroscopy.
abstract: Quartz-enhanced photoacoustic spectroscopy (QEPAS) based on double acoustic microresonators (AmRs) is developed and experimentally investigated. The double AmR spectrophone configuration exhibits a strong acoustic coupling between the AmR and the quartz tuning fork, which results in a ∼5  ms fast response time. Moreover, the double AmRs provide two independent detection channels that allow optical signal addition or cancellation from different optical wavelengths and facilitate rapid multigas sensing measurements, thereby avoiding laser beam combination.
authors: Lei
authors: L
authors: Dong
authors: Hongpeng
authors: H
authors: Wu
authors: Huadan
authors: H
authors: Zheng
authors: Yanyan
authors: Y
authors: Liu
authors: Xiaoli
authors: X
authors: Liu
authors: Wenzhe
authors: W
authors: Jiang
authors: Lei
authors: L
authors: Zhang
authors: Weiguang
authors: W
authors: Ma
authors: Wei
authors: W
authors: Ren
authors: Wangbao
authors: W
authors: Yin
authors: Suotang
authors: S
authors: Jia
authors: Frank K
authors: FK
authors: Tittel