Sun Juan, Deng Hao, Liu Ningwu, Wang Hongliang, Yu Benli, Li Jingsong
Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, 23061 Hefei, China.
National Deep Sea Center, State Oceanic Administration, 266237 Qingdao, China.
Rev Sci Instrum. 2016 Dec;87(12):123101. doi: 10.1063/1.4968041.
We developed a laser absorption sensor based on a pulsed, broadband tunable external cavity quantum cascade laser (ECQCL) centered at 1285 cm. Unlike traditional infrared spectroscopy system, a quartz crystal tuning fork (QCTF) as a light detector was used for laser signal detection. Fast Fourier transform was applied to extract vibration intensity information of QCTF. The sensor system is successfully tested on nitrous oxide (NO) spectroscopy measurements and compared with a standard infrared detector. The wide wavelength tunability of ECQCL will allow us to access the fundamental vibrational bands of many chemical agents, which are well-suited for trace explosive, chemical warfare agent, and toxic industrial chemical detection and spectroscopic analysis.
我们开发了一种基于脉冲宽带可调谐外腔量子级联激光器（ECQCL）的激光吸收传感器，其中心波长为1285厘米。与传统红外光谱系统不同，使用石英晶体音叉（QCTF）作为光探测器来检测激光信号。应用快速傅里叶变换来提取QCTF的振动强度信息。该传感器系统已成功用于一氧化二氮（NO）光谱测量，并与标准红外探测器进行了比较。ECQCL的宽波长可调谐性将使我们能够探测许多化学制剂的基本振动带，这非常适合痕量爆炸物、化学战剂以及有毒工业化学品的检测和光谱分析。
