D3.2 Simultaneous Signal Acquisition by Synchronous Detection of Orthogonal Frequency Components
- Event
- SMSI 2021
2021-05-03 - 2021-05-06
digital - Band
- SMSI 2021 - Measurement Science
- Chapter
- D3 Measurement Foundations II
- Author(s)
- M. Baer, B. Schmauss - Erlangen Graduate School for Advanced Optical Technologies, Erlangen (Germany), P. Demosthenous - Cyprus Research & Innovation Center Ltd., Nicosia (Cyprus)
- Pages
- 254 - 255
- DOI
- 10.5162/SMSI2021/D3.2
- ISBN
- 978-3-9819376-4-0
- Price
- free
Abstract
We describe a multiplexing technique to simultaneously measure the absorption properties of gas at two different wavelengths using just one photodetector and an orthogonal frequency synchronous detection technique with non-sinusoidal modulation. This concept is demonstrated in a near infrared (NIR) spectroscopic application, measuring ethanol vapor in air.