Electrical Engineering Department, Princeton University, Princeton, New Jersey, USA.
Ann N Y Acad Sci. 2012 Jul;1260(1):101-11. doi: 10.1111/j.1749-6632.2012.06660.x.
Laser spectroscopic techniques suitable for molecular dispersion sensing enable new applications and strategies in chemical detection. This paper discusses the current state of the art and provides an overview of recently developed chirped laser dispersion spectroscopy (CLaDS)-based techniques. CLaDS and its derivatives allow for quantitative spectroscopy of trace gases and enable new capabilities, such as extended dynamic range of concentration measurements, high immunity to photodetected intensity fluctuations, or capability of direct processing of spectroscopic signals in optical domain. Several experimental configurations based on quantum cascade lasers and examples of molecular spectroscopic data are presented to demonstrate capabilities of molecular dispersion spectroscopy in the mid-infrared spectral region.
适用于分子分散传感的激光光谱技术为化学检测中的新应用和策略提供了可能。本文讨论了该技术的现状，并概述了最近开发的基于啁啾激光色散光谱（CLaDS）的技术。CLaDS 及其衍生技术允许对痕量气体进行定量光谱学研究，并提供了新的功能，例如扩展浓度测量的动态范围、对光探测强度波动的高抗干扰能力，或者直接在光域处理光谱信号的能力。本文提出了几种基于量子级联激光器的实验配置和分子光谱数据的示例，以展示中红外光谱区域分子色散光谱技术的能力。
