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，该激光可以同时以高分辨率确定多个属性值（例如温度和物质浓度）。 由此获得的知识可用于提高能源效率和减少污染。 它还涉及学生动手实验室活动，并培训研究生进行高级研究。这项CAREER赠款的研究目标是通过建立第一个频率梳（即，包括在离散窄带频率处的多个峰值）的基于激光的工具和技术。 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感测。 该项目将克服燃烧环境中实际频率梳传感的剩余挑战，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组分、多性质（例如温度、压力、组分浓度）测量的技术。 该项目还将使许多碳氢化合物的C-H伸缩光谱区域的中红外频率梳测量成为可能，具有现场激光吸收光谱的简单性以及萃取气相色谱或质谱的多物种能力。

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.