Fiber-Optic Photoacoustic Gas Sensor

Multi-point, -35 dB crosstalk

Passive fiber-optic photoacoustic probe with frequency-division multiplexing demodulation enables simultaneous multi-point gas monitoring in a single system, intrinsically immune to electromagnetic interference and safe for remote or hazardous environments.

Li, Chenxi · Xiao, Han · Ma, Fengxiang · Zhao, Xinyu · Zhengzhi, Wang · Qi, Hongchao · Guo, Min · Chen, Ke

Sensors and Actuators, B: Chemical 2024

Specifications

between two sensors

{'zh': '约-35', 'en': '35'} dB

Advantages

Detection limit at sub-ppm level

3 km fiber cable