Acetylene Detection (C2H2)
Importance of laser-based acetylene detection
nanoplus lasers for acetylene detection are used for:
- 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. Different customers use different wavelengths. Literature recommends the following wavelengths for acetylene detection:
Select your wavelength for acetylene detection
Above wavelengths are commonly used to detect acetylene. 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 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
|absorption line strength||S||cm / mol||∼ 1 x 10-20|
|current tuning coefficient||cT||nm / mA||0.008||0.02||0.03|
|temperature tuning coefficient||cI||nm / K||0.07||0.1||0.14|
|mode hop free tuning range||Δλ||nm||+/- 0.5||+/- 0.7||+/- 1|
|electro-optical properties of|
3030.0 nm DFB interband cascade laser
|absorption line strength||S||cm / mol||∼ 2 x 10-19|
|output power||pout||mW||> 1|
|current tuning coefficient||cT||nm / mA||0.2|
|temperature tuning coefficient||cI||nm / K||0.3|
|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.
Quality control of ethylene production in petro-chemical industry:
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:
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. 
Acetylene 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.