Mid-infrared Fourier transform spectroscopy with chip-scale thermal- and frequency comb emitters

Jakub Mnich¹, Johannes Kunsch², Matthias Budden³, Thomas Gebert³, Marco Schossig⁴, Jaroslaw Sotor¹, Lukasz Sterczewski^1*

¹Faculty of Electronics, Photonics and Microsystems, Wroclaw University of Science and Technology, Wroclaw, Poland
²LASER COMPONENTS Germany GmbH, Olching, Germany
³WiredSense GmbH, Hamburg, Germany
⁴Infrasolid GmbH, Dresden, Germany

* Presenter:Lukasz Sterczewski, email:lukasz.sterczewski@pwr.edu.pl

Spectral coverage and resolution enhancements of room-temperature Fourier transform spectrometers are presented. Using chip-based laser frequency comb sources, commercial instruments with cm-scale delay ranges can now measure spectra with MHz resolution. We also show that using a custom-built instrument with broadband optics, we can cover the whole mid-infrared, longwave infrared, and much of the THz range when an incoherent chip-sized thermal emitter is used.

Keywords: Fourier transform spectroscopy, mid-infrared, frequency comb, blackbody emitter, molecular spectroscopy