CAREER: Frequency Comb Laser Diagnostics for Combustion Environments

1454496 - rieker首席研究员将开发一种测量技术，用于对传统传感器来说过于苛刻的燃烧环境。目标是实现具有多个波长的激光，可以同时确定高分辨率的多个属性值（如温度和物种浓度）。由此获得的知识可用于提高能源效率和减少污染。它还包括学生动手实验活动，并培养研究生进行高级研究。这项CAREER资助的研究目标是通过建立基于燃烧系统的第一个频率梳（即由离散窄带频率的多个峰组成）激光工具和技术，解决燃烧环境中原位、多物种、多特性测量的困难。频率梳能够以前所未有的光谱分辨率和速度进行宽带吸收传感。该项目将克服燃烧环境中基于频率梳的传感的实际挑战，即降低系统复杂性和提高信噪比。该项目将展示在煤气化反应器中进行多物种、多属性（如温度、压力、物种浓度）测量的技术。该项目还将利用原位激光吸收光谱的简单性以及萃取气相色谱或质谱的多组分能力，在许多碳氢化合物的C-H拉伸光谱区域进行中红外频率梳状测量。

1454496 - RiekerThe principal investigator will develop a measurement technique to be used in combustion environments that are too harsh for traditional sensors. The goal is to achieve a laser light with multiple wavelengths that can simultaneously determine multiple property values (such as temperature and species concentrations) with high resolutions. The knowledge thus gained can be used for enhancing energy efficiency and pollution reduction. It also involves students in hands-on laboratory activities, and training graduate students for advanced research.The research objective of this CAREER grant is to address the difficulties of in-situ, multi-species, multi-property measurements in combustion environments by establishing the first frequency comb (i.e., consisting of multiple peaks at discrete narrow-band frequencies) laser-based tools and techniques for combustion systems. The frequency comb is capable of broadband absorption sensing with unprecedented spectral resolution and speed. This project will overcome the remaining challenges to practical frequency comb-based sensing in combustion environments, namely reducing system complexity and improving signal-to-noise ratio. The project will demonstrate the technique for multi-species, multi-property (e.g. temperature, pressure, species concentration) measurements in a coal gasification reactor. The project will also enable mid-infrared frequency comb measurements in the C-H stretch spectral region of many hydrocarbons, with the simplicity of in-situ laser absorption spectroscopy as well as the multi-species capabilities of extractive gas chromatography or mass spectroscopy.