Quantum Cascade Lasers

All-electrical frequency noise reduction


A new paper published jointly by Alpes Lasers and the Laboratoire Temps-Fréquence of the University of Neuchâtel describes an all-electrical method to reduce the frequency noise and effective linewidth of Quantum Cascade Lasers.



In the experiment, a reduction of the linewidth from 1.7 MHz in
the standard constant current mode of operation down to 480 kHz is demonstrated at 10-ms observation time without recourse to a calibrated gas cell.
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Intermittent CW driver

The ICW driver is dedicated to the usage of a QCL laser using the ICW modulation scheme which allows one to perform spectroscopy with slow detectors while using lasers at low duty cycle.

This scheme can be implemented with the new ICW driver developed specifically for this application and now available for loan or purchase.

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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.
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Laser Safety

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