基于泛频振动的石英增强光声光谱测声器优化设计

发布时间：2018-05-26 10:38

  本文选题：石英增强光声光谱 + 音叉式石英晶振　； 参考：《光子学报》2017年08期

【摘要】：为了进一步提高基于泛频振动的石英增强光声光谱测声器探测灵敏度,在一次泛频振动模式下采用一个比商用标准音叉外形尺寸大5倍的定制大音叉,并对其性能进行优化.通过理论和实验研究得出了音叉与激光的最佳作用位置,发现音叉的一次泛频振动有两个波腹点,且在距离音叉根部8 mm处,音叉振臂的振动幅度最大.微型声音谐振腔由三种不同内径的不锈钢毛细管加工而成,与音叉组成共轴配置石英增强光声光谱光谱测声器,用来进一步增强信号幅值.在最佳微型声音谐振腔配置下,获得了30倍的信号增益因子,有效提高了石英增强光声光谱光谱测声器的探测灵敏度.
[Abstract]:In order to further improve the detection sensitivity of quartz enhanced photoacoustic spectrometer based on pan-frequency vibration, a custom-made tuning fork, which is 5 times larger than the commercial standard tuning fork, is adopted in the primary pan-frequency vibration mode, and its performance is optimized. Through theoretical and experimental study, the optimal position of tuning fork and laser is obtained. It is found that the tuning fork has two wave-belly points in one time, and the amplitude of vibration of tuning fork arm is the largest at the distance of 8 mm from the root of the tuning fork. The micro acoustic resonator is made of three stainless steel capillary tubes with different inner diameters, and coaxial with tuning forks is equipped with quartz enhanced photoacoustic spectrometer to further enhance the signal amplitude. The signal gain factor of 30 times is obtained under the optimal configuration of the micro acoustic cavity, and the detection sensitivity of the quartz enhanced photoacoustic spectrometer is improved effectively.
【作者单位】： 中国辐射防护研究院;山西大学激光光谱研究所量子光学与光量子器件国家重点实验室;新乡市第一中学;山西大学极端光学协同创新中心;
【基金】：国家自然科学基金(Nos.61622503,61575113)资助~~
【分类号】：TB51
，

本文编号：1936919