Laser Megajoule amplifier production. Engineer carrying out a 3D analysis of a slab of glass that has been impregnated with neodymium. It is one of thousands of glass slabs that will be used to amplify lasers in the Laser Megajoule (LMJ). The LMJ is an experimental nuclear fusion device being built near Bordeaux, France, using the inertial confinement fusion (ICF) method. It uses 240 laser beams and 1.8 megajoules of power to heat a target to the point where fusion and power generation occurs. Construction of the LMJ started with the Laser Integration Line (LIL, 8 lasers), completed in 2002 and due to be expanded into the full LMJ by 2012. Photographed at the SAGEM?ａ¨REOSC facility in Saint-Pierre du Perray, France.