Quantum cascade diode laser could be vital for safeguarding aircraft: "Despite their name, heat-seeking missiles actually seek a characteristic infrared light given off by hot objects. Though invisible to the human eye, tiny detectors inside the missiles can detect this infrared light and use it for guidance.

To ensure the safety of aircraft, infrared countermeasure (IRCM) systems are used to confuse or blind the detectors. These systems require a high-power light source that can emit light at the correct wavelength. While various existing light sources may be able to succeed in disrupting the detectors, most are based on technology that is both bulky and expensive. Therefore, only a few military aircraft are now protected by IRCM systems. Developing a compact and inexpensive infrared light source will allow for widespread use of IRCMs, but it has proven to be a significant technical challenge. "