QEPAS nitric oxide sensor based on a mid-infrared fiber-coupled quantum cascade laser

Wei Ren; Chao Shi; Zhen Wang; Chenyu Yao

doi:10.1117/12.2262961

23 April 2017 QEPAS nitric oxide sensor based on a mid-infrared fiber-coupled quantum cascade laser

Wei Ren, Chao Shi, Zhen Wang, Chenyu Yao

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103231Z (2017) https://doi.org/10.1117/12.2262961
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We report a quartz-enhanced photoacoustic sensor (QEPAS) for nitric oxide (NO) detection using a mid-infrared fibercoupled quantum cascade laser (QCL) near 5.2 μm. The QCL radiation was coupled into an InF3 fiber (100 μm core diameter) for light delivery to the quartz tuning fork, a tiny piezoelectric element converting the acoustic wave induced mechanical vibration to the gas-absorption associated electrical signal. This mid-infrared fiber can achieve nearly single-mode light delivery for the target wavelength. The off-beam configuration was adopted for the fiber-coupled detection considering its simpler installation, optical alignment and comparative sensitivity to the traditional on-beam setup.

Citation Download Citation

Wei Ren, Chao Shi, Zhen Wang, and Chenyu Yao "QEPAS nitric oxide sensor based on a mid-infrared fiber-coupled quantum cascade laser", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103231Z (23 April 2017); https://doi.org/10.1117/12.2262961

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