Oxygen Detection (O2)
Importance of laser-based oxygen detection
nanoplus lasers for oxygen detection are used for:
- Process Optimization: Combustion control
- Process Optimization: Power maximization
- Health: Breath gas analysis
Tunable diode laser spectroscopy allows measuring O2 with up to ppb precision in real time and in situ. Providing long-term stability and requiring little maintenance, nanoplus lasers are suitable for operation in harsh environments.
Standard wavelengths for oxygen detection
nanoplus offers various wavelengths to target the vibrational-rotational bands of oxygen. Different customers use different wavelengths. Literature recommends the following wavelengths for oxygen detection:
Select your wavelength for oxygen detection
Above wavelengths are commonly used to detect oxygen. When you choose your wavelength, you have to consider product set up, environment and nature of the measurement. These factors decide if the selected wavelength is a good match. Let us know the wavelength you require with an accuracy of 0.1 nm!
Do have a look at the HITRAN database to evaluate further wavelengths.
Related information for laser-based oxygen detection
Specifications & Mountings
Papers & Links
The following tables analyse the typical specifications of the standard wavelengths for O2 detection.
|electro-optical properties of|
760.8 nm DFB laser diode
|absorption line strength||S||cm / mol||∼ 7.7 x 10-24|
|current tuning coefficient||cT||nm / mA||0.01||0.02||0.025|
|temperature tuning coefficient||cI||nm / K||0.04||0.05||0.07|
|mode hop free tuning range||Δλ||nm||+/- 0.5|
|mounting options /|
|wavelength||TEC||cap with window||AR cap with AR window||fiber||heatsink||collimation|
|TO5.6||760 nm - 3000 nm||NA||✔||NA||NA||NA||NA|
|TO5||760 nm - 3000 nm||✔||NA||✔||NA||✔||✔|
|TO66||3000 nm - 6000 nm||✔||NA||✔||NA||✔||✔|
|c-mount||760 nm - 3000 nm||NA||NA||NA||NA||NA||NA|
|SM-BTF||760 nm - 2360 nm||✔||NA||NA||single mode||NA||NA|
|PM-BTF||1064 nm - 2050 nm||✔||NA||NA||polarization maintaining||NA||NA|
Please find below a number of application samples.
Combustion control in high temperature processes:
Oxygen control enhances process and cost efficiency of incinerators. Oxidation requires excess air. But too much air cools down the combustion and increases the amount of CO in the flue gas. Real-time and in situ monitoring helps to optimize the oxygen content in combustion processes. 
Monitoring of gas in the lungs and intestines of newborn infants:
Child mortality is high among preterm newborn infants. They are often affected by free gas in lungs and intestines, which may lead to the breakdown of vital organs. The current diagnosis is based on X-ray radiography. According to a study a bed-side, rapid, non-intrusive, and gas-specific technique for in vivo gas sensing would improve diagnosis and enhance the babies' chance of survival. The detection method is based on laser spectroscopy. 
Power maximization of hypersonic aircraft engines:
The maximum power, fuel efficiency and stability of hypersonic aircraft engines depend on the captured air volume. Monitoring the oxygen concentration and velocity are important measures to define the airflow.
Please find below a selection of related papers from our literature list.
Let us know if you published a paper with our lasers. We will be happy to include it in our literature list.
#3 Gas monitoring in the process industry using diode laser spectroscopy;
I. Linnerud, P.Kaspersen, T. Jaeger, Appl. Phys. B 67, 1998, pp. 297-305.
#9 DFB Lasers Between 760 nm and 16 µm for Sensing Applications;
W. Zeller, L. Naehle, P. Fuchs, F. Gerschuetz, L. Hildebrandt, J. Koeth, Sensors 2010, 10, pp. 2492-2510.
#51 Noninvasive monitoring of gas in the lungs and intestines of newborn infants using diode lasers: feasibility study;
P. Lundin, E.K. Svanberg, L. Cocola, M.L. Xu, G. Somesfalean, S. Andersson-Engels, J. Jahr, V. Fellman, K. Svanberg, S. Svanberg, J. of Biomed. Opt., 18(12), Dec. 2013, 127005.
#63 Breath Analysis Using Laser Spectroscopic Techniques: Breath Biomarkers, Spectral Fingerprints, and Detection Limits;
C. Wang and P. Sahay, Sensors 2009, 9, 8230-8262.