This paper describes the goal and the design of the Megajoule Laser to be b
uilt in France at the beginning of the next century. Several technical deve
lopments are related to this new design and justify the use of new technolo
gies. Most of them are the continuation of a developmental effort by the CE
A for several years. Some have come from developments needed for other appl
ications, such as telecommunications. (C) 1999 Elsevier Science S.A. AU rig
hts reserved.