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使用Pound-Drever-Hall信号进行空洞增强气体传感的镜像反射率的直接读取

Hui Zhang, Dongqing Zhang, Mengpeng Hu

|November 15, 2023

概括

这项研究引入了一种直接方法,用于空腔增强光谱校准镜像反射率,从而消除了对已知的气体样本或复杂设备的需求. 这简化了吸收测量,并提高了气体检测系统的实用性.

科学领域:

光学光谱学是指光学光谱学.
洞穴增强技术洞穴增强技术
计量学计量学计量学

背景情况:

洞穴增强技术需要精确的镜子反射度校准,以准确量化吸收.
现有的方法通常需要已知的气体度或先进的光学/电气设置.

研究的目的:

开发一种直接方法,用于校准空腔增强系统中的有效镜像反射率.
消除对外部校准标准或高速仪器仪表的需求.

主要方法:

使用相调节器生成侧带用于Pound-Drever-Hall错误信号生成.
分析波形状错误信号以确定有效的镜像反射率.
在近红外镜的80纳米范围内的校准证明.

主要成果:

在中心波长范围内,实现了2×10−5的反射率不确定性.
在1531.6nm时推断出有效反射率为0.9982 (细度~1746),有效反射率为1531.6nm.
启用了9.1 × 10^-9 cm^{-1的最小可检测吸收系数,用于使用8厘米腔的C₂H₂检测.}

结论:

这种新的方法允许方便,近乎实时的反射性校准.
这种方法提高了空腔增强气体测量的实用性,即使有镜像退化.

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