Quantum Cascade Lasers

Recent applications of QCLs

We present two recent new applications of Quantum Cascade Lasers that have been recently published.

In the first paper published in Nature Communications, a team from ETH Zürich has used two AL broad gains lasers in frequency comb operation to perform dual-comb spectroscopy in the mid-infrared. They achieve broadband high-resolution (80 MHz) absorption spectroscopy.

Villares, G. et al.,Dual-comb spectroscopy based on quantum-cascade-laser frequency combs. Nat. Commun. 5:5192 doi: 10.1038/ncomms6192 (2014)

In the second experiment, which has been discussed in Laser Focus World, researchers at Stanford University have incorporated a QCL into a cavity-enhanced absorption spectroscopy instrument for detection of carbon monoxide (CO) in situ in a shock tube with high time resolution.

K. Sun et al., Opt. Exp., 6 October 2014; doi:10.1364/OE.22.024559.

A similar shock tube experiment has also been performed by the King Abdullah University of Science and Technology:

Robin S.M. Chrystie, Ehson F. Nasir, and Aamir Farooq, "Ultra-fast and calibration-free temperature sensing in the intrapulse mode", Optics Letters, 39(23), 6620-6623, (2014).

All these experiments have been performed with lasers from Alpes Lasers. Get your own!

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Laser Safety

Alpes now offers laser safety goggles with 7+ OD protection in the mid-IR.
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Intermittent CW modulation

A new modulation scheme has been developed in collaboration between Alpes Lasers and Air Pollution /  Environmental Technology group of EMPA. read more


In celebration of the 20 years of the QCL event which took place on January 16th and 17th 2014 in ETH Zürich, we present a short demonstrational video which showcases what happens optically, electrically and thermally in a QCL when under increasing bias.

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