Top Wavelength: 760.8 nm DFB Laser

DFB laser diodes at 760.8 nm are used for oxygen detection. Please have a look at the key features, specifications and applications.

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 linewidth
  • 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 760.8 nm


Mountings & Accessories


Papers & Links

The following table summarizes the typical DFB laser specifications at 760.8 nm.

parameters (T = 25 °C)symbolunitminimumtypicalmaximum
wavelength precisionδnm0.1
optical output powerPoutmW5
forward currentIfmA30
threshold currentlthmA101530
current tuning coefficientCInm / mA0.010.020.025
temperature tuning coefficientCTnm / K0.040.050.07
typical maximum operating voltageVopV2
side mode suppression ratioSMSRdB> 35
slow axis (FWHM)degrees303540
fast axis (FWHM)degrees506065
emitting areaW x Hµm x µm1.2 x 1.31.5 x 22 x 2.2
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 761 nm DFB laser diode
Figure 1: Spectrum of nanoplus 761 nm DFB laser diode
Figure 2: Mode hop free tuning of nanoplus 761 nm DFB laser diode
Figure 2: Mode hop free tuning of nanoplus 761 nm DFB laser diode
Figure 3: Typical power, voltage and current characteristics of nanoplus 761 nm DFB laser diode
Figure 3: Typical power, voltage and current characteristics of nanoplus 761 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.

nanoplus offers a variety of free space and fiber coupled mountings. Configure your laser according to your needs.

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

Fiber coupled mounting

Opt for our SM fiber coupled butterfly package with TEC and thermistor. Please click on the mounting for detailed specifications and dimensions. The SM-BTF is available for lasers up to 2360 nm.

butterfly package with single mode fiber, TEC and thermistor,
FC / APC connector
butterfly package with single mode fiber


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.


Please find below a number of application samples.

Combustion control in high temperature processes: O2 and CO
Oxygen control enhances process and cost efficiency of incinerators. Oxidation requires excess air. But too much air cools down the combustion and increases the amount of CO in the flue gas. Real-time and in situ monitoring helps to optimize the oxygen content in combustion processes. [3]

Monitoring of gas in the lungs and intestines of newborn infants: H2O and O2
Child mortality is high among preterm newborn infants. They are often affected by free gas in lungs and intestines, which may lead to the breakdown of vital organs. The current diagnosis is based on X-ray radiography. According to a study a bed-side, rapid, non-intrusive, and gas-specific technique for in vivo gas sensing would improve diagnosis and enhance the babies' chance of survival. The detection method is based on laser spectroscopy. [51]

Power maximization of hypersonic aircraft engines: O2
The maximum power, fuel efficiency and stability of hypersonic aircraft engines depend on the captured air volume. Monitoring the oxygen concentration and velocity are important measures to define the airflow.

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.

#3 Gas monitoring in the process industry using diode laser spectroscopy;
I. Linnerud, P.Kaspersen, T. Jaeger, Appl. Phys. B 67, 1998, pp. 297-305.

#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.

#51 Noninvasive monitoring of gas in the lungs and intestines of newborn infants using diode lasers: feasibility study;
P. Lundin, E.K. Svanberg, L. Cocola, M.L. Xu, G. Somesfalean, S. Andersson-Engels, J. Jahr, V. Fellman, K. Svanberg, S. Svanberg, J. of Biomed. Opt., 18(12), Dec. 2013, 127005.

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