Quantum Light Modules

Hybrid integrated miniaturized quantum light modules are newly developed components for mid-infrared (mid-IR) hyperspectral imaging and quantum optical coherence tomography (OCT) sensing.

Our quantum light modules are based on entangled photon pairs that are brought to interference in a nonlinear interferometer - and in this way gain access to the mid-IR spectral range. Measurements are made solely in the NIR. Thus, neither detectors nor radiation sources in the mid-IR are required. For the quantum light modules, we assemble novel laser diodes, micro-optical elements and a nonlinear optical crystal in a very small space.

Micro-integrated laser module
Micro-integrated laser module - detail view

Our current projects

Quantum OCT in mid-IR (QUIN)

In project QUIN we are currently developing a miniaturized sensor head for 3D-quantum imaging using optical coherence tomography with entangled photons in the mid-infrared. For example, this sensor head can be combined with a high-resolution spectrometer to calculate distance and structure information. Such a sensor system will provide 3D-depth information.


  • Quantum OCT of ceramic and polymer materials

typical wavelengths

  • 3,5 - 4,1 µm


  • Humboldt-Universität zu Berlin
  • Fraunhofer-Institut für Lasertechnik ILT
  • Solectrix
  • Brüder Neumeister
  • BASF (associated partner)
  • Arges (associated partner)
  • Brilliance Fab Berlin (associated partner)
  • Solectrix Systems (associated partner)

Spectral quantum light microscopy in the mid-IR

The miniaturized quantum light modules that we are currently developing can be used in interaction  with other modules, such as detection and analysis modules, in microscopy and environmental analysis, respectively.


Typical wavelengths

  • 3,2 - 3,6 µm


  • Wessling
  • eagleyard Photonics,
  • Westphalia DataLab
  • Humboldt-Universität zu Berlin
  • Westfälische Wilhelms-Universität Münster