title: [The optical beam].
abstract: The optical beam emitted by a high power laser has been studied. The beam cross section at various locations is considered, from optical and photometrical points of view. Output wavefront shaping is deduced as well as some ideas about focusing devices.
authors.affiliation: The Commissiarat à l'Energie Atomique, Boite Postale 27, Villeneuve St-Georges, France.
authors.forename: J
authors.initials: J
authors.lastname: Metz
authors.forename: A
authors.initials: A
authors.lastname: Terneaud
authors.forename: P
authors.initials: P
authors.lastname: Veyrie