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In an external cavity (EC) quantum cascade laser, the quantum cascade device serves as the laser gain medium. One, or both, of the waveguide facets has an anti-reflection coating that defeats the optical cavity action of the cleaved facets. Mirrors are then arranged in a configuration external to the QC device to create the optical cavity.
In his time there, his work focused on intersubband transitions and the development of the quantum cascade laser. In 1994, he succeeded in building an experimental quantum cascade laser using molecular-beam epitaxy collaboratively with Federico Capasso, Deborah Sivco, Carlo Sirtori, Albert Hutchinson and Alfred Y. Cho [ 4 ] [ 5 ] [ 3 ]
A Quantum Cascade Detector (QCD) is a photodetector sensitive to infrared radiation. [2] The absorption of incident light is mediated by intersubband transitions in a semiconductor multiple-quantum-well structure. The term cascade refers to the characteristic path of the electrons inside the material bandstructure, induced by absorption of ...
Alpes Lasers S.A. is a Swiss engineering company and manufacturer of Infrared lasers and electrical drivers based in St-Blaise, Canton of Neuchâtel.The company was the first to commercialize the quantum-cascade laser (QCL) for scientific, [2] [3] industrial [4] and medical [5] use. [6]
In a standard multiple quantum well laser, the active quantum wells used to generate photons are connected in parallel. Consequently, a large current is required to replenish each active well with electrons as it emits light. In a cascade laser, the wells are connected in series, meaning that the voltage is higher but the current is lower.
The spectroscopy is based on semiconductor quantum cascade laser frequency combs [1] [2] in the mid-infrared wavelength range. The company is based in Zurich , Switzerland and was founded in 2014 and acquired by Sensirion Holding in May 2021.
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Laser direct infrared imaging (LDIR) is an infrared microscopy architecture that utilizes a tunable Quantum Cascade Laser (QCL) as the IR source. [1] This new reflectance-based architecture eliminates coherence artifacts typically associated with QCLs.