Caratterizzazione del rivelatore a cascata quantistica illuminato da un laser a cascata quantico

I am doing an internship at Mirsense, at a start up located in Paris. I am working on Quantum Cascade Detector (QCD) and in particular I am setting up an optical bench to simulate their behavior in an integrated circuit composed of a source (Quantum Cascade Laser), lens and gas, QCDs, used for gas spectroscopy.