Quantum Cascade Lasers



Extended Tuning DFB Sources


Alpes Lasers introduces a new class of lasers: the QC-XT Laser SourcesQC-XT Lasers allow a very large tuning range of 2% of the central wavelength (40 cm-1 at 5 microns).

N2O Spectroscopy using a QC-XT laser

The system is controlled by three independent current inputs. Two inputs control the front and back mirrors of the cavity (IF and IB).The laser itself is driven by the laser current IL and behaves as anormal DFB laser with the available range modified by the values of IF and IB.

By using different mirror configurations, the laser can be rapidly switched between different configurations, allowing rapid multi-point sampling and/or scanning. 

Key Benefits:
  • Wavelength and power independent control
  • Direct access to any wavelength
  • Extended tuning range at constant heat-sink temperature
  • Increased wavelength scanning span fully electrically (Increased electrical wavelength scan)
  • Possibility of arbitrary scanning scheme
  • DFB wavelength reproducibility
  • DFB linewidth and noise


Come to see us at Booth #A2/300 at Laser World Munich to learn more!

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Faraday Rotation Spectroscopy


A Quantum Cascade Laser from Alpes Lasers is used to detect Nitric Oxide isotopes that play a role in the formation of the Ozone.  The Faraday Rotation Spectroscopy method is sensitive enough to detect gases to the degree of parts-per-billion (0.53ppbv/Hz^1/2 for 15NO).



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Two New Product Lines


Alpes Lasers SA introduces two new product lines to its line-up of Quantum Cascade Lasers. Both are available in High Heat Load housing with collimated output and can be included with 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. The QC-ET uses 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 way as standard DFB lasers, the integrated heater current IT will offset the wavelength much faster than the temperature change of the heatsink temperature would do.
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