Ming Zhang

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–Pé...