Top Wavelength: 4470.0 nm DFB Laser

DFB interband cascade lasers at 4470.0 nm are used for nitrogen oxide detection. Please have a look at the key features, specifications and applications.

TO66 header

Key features of nanoplus DFB interband cascade lasers

  • monomode
  • continuous wave
  • room temperature
  • low power consumption
  • tunable
  • custom wavelengths

Why choose nanoplus DFB interband cascade lasers

  • stable longitudinal and transversal single mode emission
  • precise selection of target wavelength
  • narrow laser line width
  • mode-hop-free wavelength tunability
  • fast wavelength tuning
  • typically > 5 mW output power
  • small size
  • easy usability
  • high efficiency
  • long-term stability

For more than 15 years nanoplus has been the technology leader for lasers in gas sensing. We produce lasers at large scale at our own fabrication sites in Gerbrunn and Meiningen. nanoplus cooperates with the leading system integrators in the TDLAS based analyzer industry. More than 20,000 installations worldwide prove the reliability of nanoplus lasers.

Quick description of nanoplus DFB laser technology

nanoplus uses a unique and patented technology for DFB laser manufacturing. We apply a lateral metal grating along the ridge waveguide, which is independent of the material system. Read more about our patented distributed feedback technology.

Related information for nanoplus DFB standard laser diodes at 4470.0 nm


Mountings & Accessories


Papers & Links

The following table summarizes the typical DFB laser specifications at 4470.0 nm.

wavelength precisionδnm0.1
optical output powerPoutmW> 1
forward currentIfmA70
threshold currentlthmA50
current tuning coefficientCInm / mA0.2
temperature tuning coefficientCTnm / K0.3
typical maximum operating voltageVopV4 - 6
side mode suppression ratioSMSRdB> 32
slow axis (FWHM)degrees35
fast axis (FWHM)degrees55
storage temperatureTS°C+20
operational temperature at caseTC°C+20

nanoplus DFB lasers show outstanding spectral, tuning and electrical properties. They are demonstrated in figures 1 - 3. Click on the graphics to enlarge.

Figure 1: Spectrum of nanoplus 4470 nm DFB interband cascade laser
Figure 1: Spectrum of nanoplus 4470 nm DFB interband cascade laser
Figure 2: Mode hop free tuning of nanoplus 4470 nm DFB interband cascade laser
Figure 2: Mode hop free tuning of nanoplus 4470 nm DFB interband cascade laser
Figure 3: Typical power, voltage and current characteristics of nanoplus 4470 nm DFB interband cascade laser
Figure 3: Typical power, voltage and current characteristics of nanoplus 4470 nm DFB interband cascade laser

If you are uncertain whether you require a DFB laser, compare the specifications with our Fabry Perot Lasers or contact us.

Free space mounting

nanoplus developed a specific free space package for interband cascade lasers. The TO66 header disposes of an extra large thermo-electric cooler. It is hermetically sealed with a black cap and anti reflection coated window. Please click on the mounting for detailed specifications and dimensions.

TO66 header
with TEC
and thermistor,
black cap and
AR coated window
TO66 header


TO66 heatsink
TO66 heatsink

The nanoplus TO66 heatsink facilitates your laser set up by:

  • improved heat distribution
  • connectors for laser diode driver
  • connectors for temperature controller
  • M6 thread for optical posts
  • easy use with standard cage systems
nanoplus compact collimation module with heatsink and lens
nanoplus compact collimation module with heatsink and lens

The nanoplus compact collimation module offers:

  • collimated beam
  • specified beam direction
  • identical reference and heat sink plane
  • TEC + thermistor
  • hermetically sealed laser housing

Please find below a number of application samples.

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

Monitoring of breath gas:
The field of breath analysis considers NOx 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]

Emission control of exhaust fumes:
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 NOx concentration in exhaust fumes.

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.

#64 Interband Cascade Lasers - Topical Review;
I. Vurgaftman, R. Weih, M. Kamp, C.L. Canedy, C.S. Kim, M. Kim, W.W. Bewley, C.D. Merritt, J. Abell, S. Hoefling, J. Phys. D: Appl. Phys. 48, 2015, pp. 123001-12017.

Request for quotation

Download technical notes