本文選題：石英增強(qiáng)光聲光譜 + 音叉式石英晶振�。� 參考：《光子學(xué)報》2017年08期

【摘要】：為了進(jìn)一步提高基于泛頻振動的石英增強(qiáng)光聲光譜測聲器探測靈敏度,在一次泛頻振動模式下采用一個比商用標(biāo)準(zhǔn)音叉外形尺寸大5倍的定制大音叉,并對其性能進(jìn)行優(yōu)化.通過理論和實驗研究得出了音叉與激光的最佳作用位置,發(fā)現(xiàn)音叉的一次泛頻振動有兩個波腹點,且在距離音叉根部8 mm處,音叉振臂的振動幅度最大.微型聲音諧振腔由三種不同內(nèi)徑的不銹鋼毛細(xì)管加工而成,與音叉組成共軸配置石英增強(qiáng)光聲光譜光譜測聲器,用來進(jìn)一步增強(qiáng)信號幅值.在最佳微型聲音諧振腔配置下,獲得了30倍的信號增益因子,有效提高了石英增強(qiáng)光聲光譜光譜測聲器的探測靈敏度.
[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.
【作者單位】： 中國輻射防護(hù)研究院;山西大學(xué)激光光譜研究所量子光學(xué)與光量子器件國家重點實驗室;新鄉(xiāng)市第一中學(xué);山西大學(xué)極端光學(xué)協(xié)同創(chuàng)新中心;
【基金】：國家自然科學(xué)基金(Nos.61622503,61575113)資助~~
【分類號】：TB51
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本文編號：1936919