Quantum cascade lasers are the most powerful and efficient mid-IR semiconductor technology. Their niche market has a strong annual growth and provides decisive advantages over other mid infrared laser technologies. As a semiconductor laser, QCLs are small and the direct conversion from electricity to light ensures a high conversion efficiency. mirSense has been developing quantum cascade laser-based solutions for 5 years now and ranks among the very few companies mastering this technology. The main value brought by this technology in this market is to deliver coherent and bright sources in the band II and band III of transmission of the atmosphere. We focus in particular on the application of this technology to defense applications like DIRCM. Our strong innovation propensity has lead us to build a strong IP and innovative solutions.