The French Commission for Atomic Energy is currently involved in a project which consists of the construction of a 2 MJ/500TW (351-nm) laser, so-called LMJ (Megajoule-class laser) devoted to Inertial Confinement Fusion (ICF) research in France. A prototype facility so-called LIL is used today to qualify the laser architecture. For these high power lasers the sol-gel process has been selected for 95% of laser optical coated area because of room temperature and atmospheric pressure deposition conditions with guarantee for high optical and laser-included damage performances at a low cost compared to conventional vacuum deposition processes,. Today, we have developed a large variety of coatings, such as antireflective, environmental protective, broad-band antireflective, scratch resistant or high reflective coatings for our laser needs. Due to their ability to ensure appropriate deposited optical thickness, room-temperature deposition techniques such as dip-, spin- or laminar-flow-coating have been optimized for laser coating production. Today, 264 components have been successfully coated for the LIL laser needs.. Optical and laser damage characterizations show the produced component performances being in compliance with the high power laser requirements.