The French-German Research Institute of Saint-Louis is a binational research institute established by the Federal Republic of Germany and the French Republic on the basis of a treaty signed in 1958. The core mission of ISL is: "Research, scientific studies and basic predevelopment in the field of defense and security.
The classical working areas of ISL include: laser-matter interaction, laser development, detonics, perforation, protection, ballistics, the environment and protection of the soldier, acoustics, power electronics, high-power microwaves, aerodynamics and flight mechanics, optronics, sensors.
ISL has reinforced its activities on issues of civil security and countermeasures against terrorism encountered both at home and during overseas military operations.
The institute is situated in Southern Alsace near the German and Swiss borders.