1980–1984
The idea of a single-pass FEL for short wavelengths is introduced in the works of A.M. Kondratenko and E.L. Saldin (1980) as well as R. Bonifacio, C. Pellegrini, and L.M. Narducci (1984).
1992
At an international collaboration at DESY, scientists begin to develop and test the technology for the Tera-Electronvolt Energy Superconducting Linear Accelerator (TESLA) project. This technology eventually forms the basis for the European XFEL.