Tianli Gao

Ultrasensitive Single-Fiber Fabry-Pérot Photoacoustic Acetylene Sensor Enabled by a T-Type Acoustic Resonator.

Single-fiber photoacoustic spectroscopy is attractive for compact, remote, and intrinsically safe trace-gas sensing, but its sensitivity is limited by the short absorption length and weak photoacoustic excitation in a miniaturized sensing head. Here, we propose and demonstrate an ultrasensitive single-fiber Fabry-Pérot...