Quantum Cascade Lasers

Frequency Combs Lasers

Frequency Comb Quantum Cascade Lasers are devices emitting light on a wide spectrum consisting of equidistant peaks in frequency space. The distance between these peaks being fixed, typically given by the pulse repetition rate of a train of ultrashort pulses, they can be used as rulers in the frequency domain for Frequency Comb Spectroscopy.

In the mid-infrared range, Quantum Cascade Lasers with specifically engineered optical dispersion have been shown to emit broad and powerful optical frequency combs. As for ultrashort-pulse lasers, the mode spacing of QCL combs is given by cavity length. However, in the case of QCLs, the periodic modulation in the time-domain is of the FM, not AM, type and the output power is constant.

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Frequency Comb Quantum Cascade Lasers are now available from Alpes Lasers at central wavelengths of 7.95 microns with an Optical Frequency Span of 60 cm-1. Write to us for more detail and get them for your lab!


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High Peak Power Source



Alpes Lasers introduces its new high peak power sources. Based on a unique gain-guided design, these Quantum Cascade Lasers are optimized for emitting short pulses from 20 ns to 1000 ns with minimum peak power of 20 W, or ~5 microjoules per pulse. 
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QCLs used for GHG monitoring

In this study, Harris et al. use QCL to track the isotopic composition  of the greenhouse gas nitrous oxide over a period of 18 months on a suburban site in Switzerland. This allows tracking of the natural and anthropogenic sources of the pollutant. QCLs allow for isotopic measurements of a large number of organic molecules including all major greenhouse gases for both rapid and long term variability study.
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Collaborations

Alpes Lasers announces its collaboration in the WaterSpy partnership read more