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Published on: February 14, 2014
Oxygen measurement by multimode diode lasers employing gas correlation spectroscopy
Xiutao Lou1, Gabriel Somesfalean, Bin Chen
1Department of Physics, Harbin Institute of Technology, Harbin 150001, People's Republic of China.
Applied Optics
|February 12, 2009
Summary
A new multimode diode laser (MDL)-based correlation spectroscopy (COSPEC) sensor effectively measures ambient oxygen. This MDL-COSPEC system offers high stability and lower cost compared to tunable diode laser absorption spectroscopy (TDLAS).
Area of Science:
- * Spectroscopy
- * Laser technology
- * Environmental monitoring
Background:
- * Oxygen measurement is crucial for environmental and industrial applications.
- * Diode laser (DL) based spectroscopy offers high sensitivity and selectivity.
- * Existing methods like tunable diode laser absorption spectroscopy (TDLAS) can be complex and costly.
Purpose of the Study:
- * To develop and evaluate a novel oxygen sensor using multimode diode laser (MDL)-based correlation spectroscopy (COSPEC).
- * To compare the performance of the MDL-COSPEC sensor with the established TDLAS technique for ambient oxygen measurement.
- * To highlight the advantages of the MDL-COSPEC approach in terms of stability, cost, and usability.
Main Methods:
- * Employed a multimode diode laser (MDL) with an emission spectrum overlapping oxygen absorption lines in the A band.
- * Utilized correlation spectroscopy (COSPEC) principles for oxygen detection.
- * Conducted comparative measurements using a tunable diode laser absorption spectroscopy (TDLAS) instrument.
Main Results:
- * Achieved a sensitivity of 700 ppm m for oxygen detection.
- * Demonstrated high accuracy (2%) and excellent linearity (R(2)=0.999).
- * The MDL-COSPEC sensor exhibited superior stability, lower cost, and ease of use compared to TDLAS.
Conclusions:
- * MDL-based COSPEC is a viable and advantageous technique for measuring ambient oxygen.
- * The MDL-COSPEC sensor offers a cost-effective, stable, and user-friendly alternative to TDLAS.
- * This technology has potential for widespread application in environmental monitoring and other fields requiring oxygen sensing.
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