In this paper, we reported a new multi-point sensor for C₂H₂ detection based on photoacoustic spectroscopy and acousto-optic Q-switched fiber laser. Three transmission-type PAS cells were placed inside the fiber laser cavity and used for C₂H₂ detection simultaneously to demonstrate the potential of spatially resolved measurements. A maximum pulse peak power of ∼544 mW was generated by the acousto-optic Q-switched fiber laser. The signal-to-noise ratios (SNR) calculated from the experimental results was 57.7 dB, 45.1 dB and 57.2 dB. This resulted in a minimum detection limit (MDL) for C₂H₂ of 1.73 ppmv, 7.82 ppmv and 1.93 ppmv for PAS cell 1, PAS cell 2 and PAS cell 3, respectively.

在本文中，我们报道了一种基于光声光谱和声光调Q光纤激光器的用于C ₂ H ₂检测的新型多点传感器。将三个透射型PAS单元放置在光纤激光腔内，并同时用于C ₂ H ₂检测，以证明空间分辨测量的潜力。声光调Q光纤激光器产生的最大脉冲峰值功率约为544 mW。根据实验结果计算出的信噪比（SNR）为57.7 dB，45.1 dB和57.2 dB。这导致PAS单元1，PAS单元2和PAS单元3的C ₂ H ₂的最低检测限（MDL）分别为1.73 ppmv，7.82 ppmv和1.93 ppmv。