Abstract: A method and apparatus for protecting the seed laser a laser produced plasma (LPP) extreme ultraviolet (EUV) light system are disclosed. An isolation stage positioned on an optical path diverts light reflected from further components in the LPP EUV light system from reaching the seed laser. The isolation stage comprises two AOMs that are separated by a delay line. The AOMs, when open, direct light onto the optical path and, when closed, direct light away from the optical path. The delay introduced by the delay line is determined so that the opening and the closing of the AOMs can be timed to direct a forward-moving pulse onto the optical path and to divert reflected light at other times. The isolation stage can be positioned between gain elements to prevent amplified reflected light from reaching the seed laser and other potentially harmful effects.

Abstract: A portable solar power system and a method for deploying the portable solar power system are disclosed. The portable solar power system may include a foldable plate including a non-foldable portion and at least one foldable portion with respective to the non-foldable portion, both of which have respective surfaces on which a solar cell array is mounted; a rotating mechanism for rotating the foldable plate at least in a generally horizontal plane; and a mast for supporting at least a part of the rotating mechanism and the foldable plate.