nanoplus | Nitrogen Oxides Detection (NO<sub>x</sub>)

Application areas of laser-based nitrogen oxide detection

nanoplus lasers for nitrogen oxide detection are used for various applications including:

Environment: Emission control
Health: Breath gas analysis
Health: Monitoring of medical gas

Tunable diode laser spectroscopy allows measuring NO_x 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 nitrogen oxide detection

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

Select your wavelength for nitrogen oxide detection

Above wavelengths as well as further customized wavelengths for the detection of nitrogen oxides 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 nitrogen oxides in the 0.76 µm to 6.0 µm range

Related information for laser-based nitrogen oxide detection

Specifications & Mountings

Applications

Papers & Links

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

electro-optical properties of 1814.0 nm DFB laser diode	symbol	unit	minimum	typical	maximum
standard wavelength	λ	nm		1814.0
absorption line strength	S	cm / mol		∼ 5 x 10^-23
output power	p_out	mW		5
threshold current	l_th	mA	20	35	65
current tuning coefficient	c_T	nm / mA	0.008	0.02	0.03
temperature tuning coefficient	c_I	nm / K	0.07	0.1	0.14
mode hop free tuning range	Δλ	nm		+/- 0.5

electro-optical properties of 2670.0 nm DFB laser diode	symbol	unit	minimum	typical	maximum
standard wavelength	λ	nm		2670.0
absorption line strength	S	cm / mol		∼ 4 x 10^-22
output power	p_out	mW		2
threshold current	l_th	mA	30	50	80
current tuning coefficient	c_T	nm / mA	0.01	0.02	0.05
temperature tuning coefficient	c_I	nm / K	0.15	0.2	0.28
mode hop free tuning range	Δλ	nm		+/- 0.5

electro-optical properties of 2860.0 nm DFB laser diode	symbol	unit	minimum	typical	maximum
standard wavelength	λ	nm		2860.0
absorption line strength	S	cm / mol		∼ 5 x 10^-20
output power	p_out	mW		2
threshold current	l_th	mA	30	50	80
current tuning coefficient	c_T	nm / mA	0.01	0.02	0.05
temperature tuning coefficient	c_I	nm / K	0.15	0.2	0.28
mode hop free tuning range	Δλ	nm		+/- 0.5

electro-optical properties of 3420.0 nm DFB interband cascade laser	symbol	unit	minimum	typical	maximum
standard wavelength	λ	nm		3420.0
absorption line strength	S	cm / mol		∼ 7 x 10^-21
output power	p_out	mW		> 5
threshold current	l_th	mA	20	30	50
current tuning coefficient	c_T	nm / mA		0.10
temperature tuning coefficient	c_I	nm / K		0.35
mode hop free tuning range	Δλ	nm		+/- 0.5

electro-optical properties of 4524.0 nm DFB interband cascade laser	symbol	unit	minimum	typical	maximum
standard wavelength	λ	nm		4524.0
absorption line strength	S	cm / mol		∼ 1 x 10^-18
output power	p_out	mW		> 3
threshold current	l_th	mA	30	40	60
current tuning coefficient	c_T	nm / mA		0.14
temperature tuning coefficient	c_I	nm / K		0.45
mode hop free tuning range	Δλ	nm		+/- 0.5

electro-optical properties of 5255.0 nm DFB interband cascade laser	symbol	unit	minimum	typical	maximum
standard wavelength	λ	nm		5255.0
absorption line strength	S	cm / mol		∼ 3 x 10^-20
output power	p_out	mW		> 2
threshold current	l_th	mA	40	50	70
current tuning coefficient	c_T	nm / mA		0.15
temperature tuning coefficient	c_I	nm / K		0.50
mode hop free tuning range	Δλ	nm		+/- 0.5

mounting options / technical drawings	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

Ask for further packages.

Please find below a number of application samples.

Emission control of flue gases: NO_x
NO_x is produced during fuel combustion at power plants and other industrial facilities. When it reacts with SO₂ it causes acid rain. For this reason NO_x and SO₂ emissions are restricted and need to be monitored. [67]

Monitoring of breath gas: NO_x
The field of breath analysis considers NO_x as a biomarker for asthma and other pulmonary diseases. This new technology becomes more established for clinical applications. It is a cost-effective and non-invasive method of diagnosis and treatment monitoring. [49, 117]

Emission control of exhaust fumes: CO₂ and NO_x
Guided by environmental policies, the automobile industry is concerned to reduce the carbon footprint of vehicles. Automotive suppliers develop innovative combustion engines to control CO₂ and NO_x concentration in exhaust fumes. [116]

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.

#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.

#11 Quantum cascade laser linewidth investigations for high resolution photoacoustic spectroscopy;
M. Germer, M. Wolff, Appl. Opt. 48, 4, 2009, pp. B80-B86.

#18 Monomode Interband Cascade Lasers at 5.2 µm for Nitric Oxide Sensing;
M. von Edlinger, J. Scheuermann, R. Weih, C. Zimmermann, L. Naehle, M. Fischer, J. Koeth, IEEE Phot. Tech. Lett., 26, 5, 2014, pp. 480-482.

#31 QCL based NO Detection;
M. Wolff, J. Koeth, L. Hildebrandt, P. Fuchs; 16th International Conference on Photoacoustic and Photothermal Phenomena.

#49 Spectroscopic monitoring of NO traces in plants and human breath: applications and perspectives;
S. M. Cristescu, D. Marchenko, J. Mandon, K. Hebelstrup, G. W. Griffith, L. A. J. Mur, F. J. M. Harren, Appl. Phys. B, 109, 3, Nov. 2012, pp. 203-211.

#50 Mid-IR difference frequency laser-based sensors for ambient CH₄, CO, and N₂O monitoring;
J. J. Scherer, J. B. Paul, H. J. Jost, Marc L. Fischer, Appl. Phys. B, 109, 3, Nov. 2012, pp. 271-277.

#63 Breath Analysis Using Laser Spectroscopic Techniques: Breath Biomarkers, Spectral Fingerprints, and Detection Limits;
C. Wang and P. Sahay, Sensors 2009, 9, 8230-8262.

#67 New Opportunities in Mid-Infrared Emission Control;
P. Geiser, Sensors, 2015, pp. 22724-22736.

# 107 Recent progress in laser‑based trace gas instruments: performance and noise analysis;
J. B. McManus, M. S. Zahniser, D. D. Nelson et. al., Appl. Phys. B, 2015, 119: 203.

#117 Nitric oxide analysis down to ppt levels by optical-feedback cavity-enhanced absorption spectroscopy;
L. Richard, D. Romanini, I. Ventrillard, Sensors, MDPI, Vol. 18, Iss. 7, 2018.

#118 The driver design for N₂O gas detection system based on tunable interband cascade laser;
L. Liao, J. Zhang, D. Dong, E3S Web Conf., Vol. 78, 2019, 03002.

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Nitrogen Oxides Detection (NOx)