Quantum Cascade Lasers

Faraday Rotation Spectroscopy


In a recent paper published in Nature by the PULSE Lab of Princeton University, a Quantum Cascade Laser from Alpes Lasers is used for the detection  of Nitric Oxide isotopes. The method used, Faraday Rotation Spectroscopy, allows for a sensitivity of the order of part-per-billion in gas detection (0.53 ppbv/Hz^1/2 for 15NO).



In addition to pollution monitoring applications (nitric oxide plays a role in ozone formation), this techniques can be used to detect minute quantities of the molecule in breath, urine and blood. NO is an important cellular signaling molecule involved in many physiological and pathological processes.

Alpes Lasers and the PULSE Labs are partners through the MIRTHE Collaboration.




Wang, Y. et al. Shot-noise Limited Faraday Rotation Spectroscopy for Detection of Nitric Oxide Isotopes in Breath, Urine, and Blood. Sci. Rep. 5 , 9096; DOI:10.1038/srep09096 (2015).


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SENSOR+TEST 2015


Meet us at Booth 201 (Hall 12) at the SENSOR+TEST expo in Nuremberg from May 19th to 21st!
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Two New Product Lines


Alpes Lasers SA introduces two new product lines to its line-up of Quantum Cascade Lasers. All are available in High Heat Load housing with collimated output and can be accompanied by appropriate drivers for optimal usage.


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Extended Tuning DFB Sources


Alpes Lasers introduces a new class of Extended Tuning DFB-QCL, the QC-ET. These QC-ET use a dual current control to extend the mode-hop free tuning to more than 0.4% of the central wavelength (>6 cm-1 at 1270 cm-1). While the first laser input allows direct intensity modulation in the same manner as standard DFB lasers, the integrated heater current IT allows to offset the wavelength much faster than the temperature change of the heatsink temperature would do.
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