Abstract
We describe a long-wavelength external ccavity quantum cascade laser, emitting from 12.3 to \(13.2\ \upmu \text {m}\) integrated into a compact design to promote portability. For this purpose, a new type of anti-reflection coating was designed as well as a new way of measuring its performance. Finally, a portion of the absorption spectrum of ammonia vapor was recorded by tuning the laser, which demonstrates the spectroscopic capacity of this EC-QCL.
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Acknowledgements
The authors thank Dr. Sascha Kalusniak for the FTIR measurement. This work was supported by the Mid-TECH project which has received funding from the European Union’s Horizon 2020 Research and Innovation Program under Grant Agreement No. 642661.
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This article is part of the topical collection “Mid-infrared and THz Laser Sources and Applications” guest edited by Wei Ren, Paolo De Natale and Gerard Wysocki.
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Mathonnière, S., Tomko, J., Matsuoka, Y. et al. External cavity quantum cascade laser emitting from 12.3 to 13.2 \(\upmu\)m. Appl. Phys. B 124, 149 (2018). https://doi.org/10.1007/s00340-018-7017-7
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DOI: https://doi.org/10.1007/s00340-018-7017-7