Distributed Feedback Lasers: 2600 nm - 3000 nm

nanoplus offers DFB laser diodes at any wavelength between 2600 nm and 3000 nm.

Key features of nanoplus DFB laser diodes

  • monomode
  • continuous wave
  • room temperature
  • tunable
  • custom wavelengths

Why choose nanoplus DFB laser diodes

  • 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 laser diodes between 2600 nm and 3000 nm


Mountings & Accessories


Papers & Links

The following table summarizes the typical DFB laser specifications in the 2600 nm to 3000 nm range:

parameters (T = 25 °C)symbolunitminimumtypicalmaximum
wavelength precisionδnm0.1
optical output powerPoutmW2
forward currentIfmA100
threshold currentlthmA305080
current tuning coefficientCInm / mA0.010.020.05
temperature tuning coefficientCTnm / K0.150.20.28
typical maximum operating voltageVopV2
slope efficiencyemW / mA0.050.080.12
side mode suppression ratioSMSRdB> 35
slow axis (FWHM)degrees203040
fast axis (FWHM)degrees405060
emitting areaW x Hµm x µm3.0 x 1.04.5 x 1.55.0 x 2.0
storage temperatureTS°C-40+20+80
operational temperature at caseTC°C-20+25+50

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 2740 nm DFB laser diode
Figure 1: Spectrum of nanoplus 2740 nm DFB laser diode
Figure 2: Mode hop free tuning of nanoplus 2740 nm DFB laser diode
Figure 2: Mode hop free tuning of nanoplus 2740 nm DFB laser diode
Figure 3: Typical power, voltage and current characteristics of nanoplus 2740 nm DFB laser diode
Figure 3: Typical power, voltage and current characteristics of nanoplus 2740 nm DFB laser diode

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

Free space mountings

Select a TO header with or without TEC. The TO headers are hermetically sealed with cap and window. Ask for customization without cap or without window. c-mount is available upon request. Please click on the mounting for detailed specifications and dimensions.

TO5 header
with TEC
and thermistor,
black cap and
AR coated window
TO5 header
TO56 header
without TEC
and thermistor,
cap and window
TO56 header
without TEC
and thermistor


TO5 heatsink
TO5 heatsink

The nanoplus TO5 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
TO5 heatsink with collimation
TO5 heatsink with collimation

The nanoplus TO5 heatsink is available with collimation. The optical set up guarantees a collimated elliptical beam shape.



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

Water vapour, hydrogen fluoride, hydrogen sulfide, nitrogen oxide, nitrous oxide and carbon dioxide show absorption features in the wavelength window between 2600 nm and 3000 nm.

For detailed absorption data, please refer to HITRAN database and to our Applications by Gas section.

Figure 4: Absorption features in 2600 nm to 3000 nm range
Figure 4: Absorption features in 2600 nm to 3000 nm range

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.

#12 CO2 concentration and temperature sensor for combustion gases using diode-laser absorption near 2.7 µm;
A. Farooq,  J.B. Jeffries, R.K. Hanson, Appl. Phys. B 90, 2008, pp. 619-628.

#30 Kalman filtering real-time measurements of H2O isotopologue ratios by laser absorption spectroscopy at 2.73 µm;
T. Wu, W. Chen, E. Kerstel, E. Fertein, X. Gao, J. Koeth, Karl Roessner, D. Brueckner, Opt. Lett., 35, 5, 2010, pp. 634.636.

#33 DFB laser diodes in the wavelength range from 760 nm to 2.5 µm;
J. Seufert, M. Fischer, M. Legge, J. Koeth, R. Werner, M. Kamp, A. Forchel, Spectroch. Acta Part A 60, 2004, pp. 3243-3247.

#44 High sensitivity Faraday rotation spectrometer for hydroxyl radical detection at 2.8 µm;
W. Zhao, G. Wysocki, W. Chen, W. Zhang, Appl. Phys. B, 109, 3, Nov. 2012, pp. 511-519.

#65 H2O temperature sensor for low-pressure flames using tunable Diode laser Absorption near 2.9 µm;
S. Li, A. Farooq, R.K. Hanson, Meas. Sci. Technol., 22, 2011, pp. 125301-125311.

#69 A quartz-enhanced photoacoustic sensor for H2S trace-gas detection at 2.6µm;
S. Viciani, M. Siciliani de Cumis, S. Borri, P. Patimisco, A. Sampaolo, G. Scamarcio, P. De Natale, F. D'Amato, V. Spagnolo, App. Phys. B, 2015, 119, pp. 21-27.

#73 Time-multiplexed open-path TDLAS spectrometer for dynamic, sampling-free, Interstitial H218O and H216O vapor detection in ice clouds;
B. Kuehnreich, S. Wagner, J.C. Habig, O. Moehler, H. Saathoff, V. Ebert, App. Phys. B, 2015, 119, pp. 177-187.

#76 Diode laser-based trace detection of hydrogen-sulfide at 2646.3 nm and hydrocarbon spectral interference effects;
R. Sharma, C. Mitra, V. Tilak, Opt. Eng. 55(3), 037106, Mar 14, 2016.

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