Spectroscopic chemical detection requires knowledge or determination of an optical path for accurate quantification of path-integrated concentration of species. Continuous-wave-laser-based spectroscopic systems operating in an open integrated-path remote sensing configuration are usually not equipped for optical path determination. Here we demonstrate a measurement technique capable of simultaneous spectroscopic chemical quantification and range finding. The range-finding functionality is implemented with chirped laser dispersion spectroscopy. The methodology is potentially useful for remote chemical sensing in a hard-target LIDAR configuration and for automatic calibration of gas cells with unknown or varying lengths.

中文翻译：

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laser激光色散光谱仪，用于光谱化学感应和同时范围检测

光谱化学检测需要了解或确定光路，以准确量化路径整合的物种浓度。在开放的集成路径遥感配置中运行的基于连续波激光的光谱系统通常不具备确定光路的功能。在这里，我们演示了一种能够同时进行光谱化学定量和测距的测量技术。测距功能通过chi激光色散光谱技术实现。该方法对于在硬目标激光雷达配置中进行远程化学感应以及对长度未知或变化的气室进行自动校准可能很有用。