@article{5568, author = {D. Oepts and A. F. G. van der Meer and R. J. Bakker and P. W. van Amersfoort}, title = {Selection of Single-Mode Radiation from a Short-Pulse Free-Electron Laser}, abstract = {We demonstrate the selection of narrow-band radiation from the output of an infrared free-electron laser operating with electron pulses of a few picoseconds duration. A continuous output with a linewidth of less than 10(-3) cm-1 and a power in the order of 10 W in macropulses with a duration around 10 mus can be obtained. The number of active cavity modes is reduced by a factor of 40 by inducing coherence between separate optical pulses in the cavity. An external Fabry-Perot interferometer is used to select one of the remaining modes.}, year = {1993}, journal = {Physical Review Letters}, volume = {70}, number = {21}, pages = {3255-3258}, month = {May 24}, isbn = {0031-9007}, doi = {10.1103/PhysRevLett.70.3255}, language = {eng}, }