Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster: Quantum Optics and Photonics III

Q 57.37: Poster

Donnerstag, 14. März 2019, 16:15–18:15, S Fobau Physik

Quantitative measurement of CO with non-dispersive infrared absorption spectroscopy — •Christian Niklas, Fabian Müller, Hainer Wackerbarth, and Georgios Ctistis — Laser-Laboratorium Göttingen e.V., Hans-Adolf-Krebs-Weg 1 , 37075 Göttingen, Deutschland

Global climate change calls for efficient handling of energy and, consequently, has led to stricter regulations of gas emissions, resulting in a higher demand for gas sensors. To satisfy the demand of these sensors, alternatives to the market dominating chemical sensors have to be developed. Optical detection techniques provide a non-invasive, stable and durable solution, which also work under harsh environments.

In this work, we use non-dispersive infrared spectroscopy (NDIR) for a sensor, capable to detect carbon monoxide (CO), an odourless and toxic gas. Furthermore, this sensor is targeted to be competitive on the market. The basic setup for the detection of CO consists of a light source, a filter and a detector. The nonlinear relation between measured transmittance and the gas density given by Beer-Lambert's law is calculated based on absorption cross sections from the HITRAN database under consideration of the spectral influences of the materials. This is used as a look-up table for the measurement process of the sensor.