DTU built a 3MHz stable and portable 1.46µ-10.46µm supercontinuum source for pollution monitoring

DTU built long wavelength mid-infrared supercontinuum source that is intended for operation in an airborne gas spectroscopy system for pollution monitoring as a part of the EU project FLying ultrA-broadband single-shot InfraRed Sensor (FLAIR). The 3MHz SC laser emit 86.6 mW output power with a spectrum spanning 1.46 µm-10.46 µm and packaged in a form factor of 47.4 cm x 30.0 cm x 13.45 cm. The average power fluctuation of the supercontinuum laser is 0.43% standard deviation with spectral stability of ±0.16 dB for wavelength < 10 µm and ± 0.6 dB for wavelength > 10 µm. “As the source does not involve a mid-infrared pump source or thulium-doped fibre amplifiers, it presented high compactness and robustness, which promises table-top and outside the laboratory mid-infrared spectroscopy and imaging application as well as for characterisation of optical fibres in the long wavelength mid-infrared region.” – says Getinet Woyessa, Scientist from Department of Photonics Engineering, Technical University of Denmark.

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