Highly sensitive SO2 photoacoustic sensor for SF6 decomposition detection using a compact mW-level diode-pumped solid-state laser emitting at 303 nm
Highly sensitive SO2 photoacoustic sensor for SF6 decomposition detection using a compact mW-level diode-pumped solid-state laser emitting at 303 nm
复制标题
高灵敏度 SO2 光声传感器，使用发射 303 nm 的紧凑型毫瓦级二极管泵浦固态激光器，用于 SF6 分解检测
DOI：
10.1364/oe.25.032581
复制
发表时间：
2017-12-25
期刊：
影响因子：
3.8
通讯作者：
Tittel, Frank K.
中科院分区：
文献类型：
--
作者：
Yin, Xukun;Dong, Lei;Tittel, Frank K.
针对电力系统中SF6气体分解检测的应用，研制了一种小型化的ppb级SO2光声传感器。在红外（IR）和紫外（UV）光谱区域中详细讨论了SO2目标光谱的选择。在此基础上，研制了一台小型紫外波段二极管泵浦固体激光器（DPSSL），输出功率为5 mW，波长为303.6nm。设计了一种差分光声池（PAC），用于匹配输出光束，获得高Q值，降低SF6缓冲气体中系统的流动噪声。在气体流速、线性和检测灵敏度方面评估传感器系统的性能。在1 s的积分时间内，SO2的检测限（1 sigma）为74 ppbv，对应的归一化噪声等效吸收（NNEA）系数为1.15 x 10（-9）cm（-1）WHz（-1/2）。(C)根据OSA开放获取出版协议的条款，2017年美国光学学会
A compact ppb-level SO2 photoacoustic sensor was developed for the application of SF6 decomposition detection in electric power systems. The selection of the SO2 target spectrum is discussed in detail in the infrared (IR) and ultraviolet (UV) spectral regions. Based on the result of the spectrum selection, a small-sized UV-band diode-pumped solid-state laser (DPSSL) emitting at 303.6 nm with an output power of 5 mW was developed. A differential photoacoustic cell (PAC) was designed to match the output optical beam, obtain a high Q-factor and reduce the system flow noise in the SF6 buffer gas. The performance of the sensor system was assessed in terms of gas flow rate, linearity and detection sensitivity. A SO2 detection limit (1 sigma) of 74 ppbv was achieved with a 1-s integration time, which corresponds to a normalized noise equivalent absorption (NNEA) coefficient of 1.15 x 10(-9) cm(-1)WHz(-1/2). (C) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement