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.

Figure 1: Absorption features of oxygen in 760 nm to 6000 nm range
Absorption features of oxygen in 760 nm to 6000 nm range

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
standard wavelengthλnm760.8
absorption line strengthScm / mol∼ 7.7 x 10-24
output powerpoutmW5
threshold currentlthmA101530
current tuning coefficientcTnm / mA0.010.020.025
temperature tuning coefficientcInm / K0.040.050.07
mode hop free tuning rangeΔλnm+/- 0.5
mounting options /
technical drawings
wavelengthTECcap with windowAR cap with AR windowfiberheatsinkcollimation
TO5.6 760 nm - 3000 nmNANANANANA
TO5 760 nm - 3000 nmNANA
TO663000 nm - 6000 nmNANA
c-mount 760 nm - 3000 nmNANANANANANA
SM-BTF760 nm - 2360 nmNANAsingle modeNANA
PM-BTF1064 nm - 2050 nmNANApolarization maintainingNANA

Ask for further packages.

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. [3]

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. [51]

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.