Acetylene Detection (C2H2)

Application areas of laser-based acetylene detection

nanoplus lasers for acetylene detection are used for various applications including:

  • Process Optimization: Quality control
  • Health: Breath gas analysis
  • Safety: Explosion prevention

Tunable diode laser spectroscopy allows measuring C2H2 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 acetylene detection

nanoplus offers various wavelengths to target the vibrational-rotational bands of acetylene. Literature recommends the following wavelengths for acetylene detection:

Select your wavelength for acetylene detection

Above wavelengths as well as further customized wavelengths for acetylene detection are available from nanoplus.

When you choose your wavelength, you have to consider your product set up, environment and nature of the measurement.

These factors influence the optimum wavelength for your application. Do have a look at the Hitran Database to further evaluate your choice of wavelengths. Our application experts are equally happy to discuss with you the most suitable wavelength for your application.

Let us know the wavelength you require with an accuracy of 0.1 nm!

Figure 1: Absorption features of acetylene in the 0.76 µm to 6.0 µm range
Absorption features of acetylene in 760 nm to 6000 nm range

Related information for laser-based acetylene detection

Specifications & Mountings


Papers & Links

The following tables analyse the typical specifications of the standard wavelengths for C2H2 detection.

electro-optical properties of
1520.0 nm DFB laser diode
standard wavelengthλnm1520.0
absorption line strengthScm / mol∼ 1 x 10-20
output powerpoutmW5710
threshold currentlthmA102030
current tuning coefficientcTnm / mA0.0080.020.03
temperature tuning coefficientcInm / K0.070.10.14
mode hop free tuning rangeΔλnm+/- 0.5+/- 0.7+/- 1
electro-optical properties of
3030.0 nm DFB interband cascade laser
standard wavelengthλnm3030.0
absorption line strengthScm / mol∼ 2 x 10-19
output powerpoutmW> 5
threshold currentlthmA203050
current tuning coefficientcTnm / mA0.10
temperature tuning coefficientcInm / K0.35
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.

Quality control of ethylene production in petro-chemical industry: C2H2
Acetylene is a by-product in the cracking process of ethylene production. The petrochemical industry minimizes the compound via hydrogenation. This process enhances the purity and quality of the manufactured ethylene. [2, 7]

Monitoring of breath gas: C2H6 and C2H2
Medical breath analysis considers ethane and acetylene as a biomarkers for asthma, schizophrenia or lung cancer. The research field of breath analysis uses methane as a biomarker for intestinal problems. [10]

Explosion prevention:
Acetylene (C2H2) is used for gas welding, because the flame is easily adjustable. At the same time, acetylene is highly explosive when it mixes with oxygen or when there is a sudden change in pressure or temperature. Even at relatively low temperatures, like 306°, a little electric spark is sufficient to cause an explosion. For workers' safety the acetylene concentration has to be continuously monitored.

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.

#2 Advanced Gas Sensing Applications Above 3 µm with DFB Laser Diodes;
L. Naehle, L. Hildebrandt, M. Fischer, J. Koeth, Gases & Instrumentation, March/April 2012, pp. 25-28.

#5 DFB lasers exceeding 3 µm for industrial applications;
L. Naehle, L. Hildebrandt, Laser+Photonics 2012, pp. 78-80.

#7 DFB laser diodes expand hydrocarbon sensing beyond 3 µm;
L. Hildebrandt, L. Naehle, Laser Focus World, January 2012, pp. 87-90.

#8 ICLs open opportuneties for mid-IR seinsing;
L. Naehle, L. Hildebrandt, M. Kamp, S. Hoefling, Laser Focus World, May 2013, pp. 70-73.

#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.

#13 Continuous-wave operation of type-I quantum well DFB laser diodes emitting in 3.4 µm wavelength range around room temperature;
L. Naehle, S. Belahsene, M. von Edlinger, M. Fischer, G. Boissier, P. Grech, G. Narcy, A. Vicet, Y. Rouillard, J. Koeth and L. Worschech, Electron. Lett. 47, 1, Jan 2011, pp. 46-47.

#36 Single mode interband cascade lasers based on lateral metal gratings;
R. Weih, L. Naehle, Sven Hoefling, J. Koeth, M. Kamp, Appl. Phys. Lett., 105, 7, 2014, pp. 071111.

#74 Laser absorption diagnostic for measuring acetylene concentrations in shock tubes;
I. Stranic, R. K. Hanson, J. of Quant. Spectrosc. and Rad. Transfer, 142, July 2014, pp. 58-65

#150 Extraordinary evanescent field confinement waveguide sensor for mid-infrared trace gas spectroscopy;
M. Vlk, A. Datta, S. Alberti, H. D. Yallew, V. Mittal, G. S. Murugan, J. Jagerska, Light Sci. Appl., Vol. 10, Art. 26, 2021.

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