I4.1 - Compact Multi Reflection Cells for Optical Gas Sensor Applications

Johannes Herbst, B. Scherer, M. Steffen, B. Halford & Armin Lambrecht
Measuring low gas concentrations with absorption spectroscopy requires long optical paths in order to obtain sufficient detection limits. For low quantities of gas or a high temporal resolution the volume of the measurement cell should be as small as possible. This is the only way to guarantee an efficient, rapid gas exchange. A gas cell setup with a mirror configuration for multiple reflection allows keeping the dimensions of the cell low and, at the same...