About Us

About us

NLIR is spin-off from the Department of Photonics Engineering at the Technical University of Denmark (DTU Fotonik) and is based on the novel patented upconversion technology invented by its founders at DTU Fotonik.

The core of the upconversion technology is a non-linear crystal that converts mid infrared light to near visible light. This enables the use of fast and efficient Silicon based sensors for detection of MIR light. Our non-linear mid infrared sensors represent a revolutionary new measurement paradigm (Resources).

Our company is named Non-Linear InfraRed sensors (NLIR) to highlight our spectrometer products technological difference from today’s leading MIR spectrometry method of Fourier-Transform InfraRed spectroscopy (FTIR).

We target several sectors: Research, Oil and gas, Polymer, Food and Agriculture, Pharmaceutical, Chemical, Medical Diagnostic and Environmental.


Peter Tøttrup

Tom Olesen

Martin Bech, BSc
Mechanical Engineer

Ricard Pedersen, MSc
Electronical Engineer

Lasse Høgstedt, PhD
Optical Engineer

Søren M. M. Friis, PhD
Optical Engineer

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