A patch cord into which a collimator pair has been intercalated is attached to the output end of a high-level light amplifier for transmitting high-level light through optical fibers from outside in a replaceable manner. With the vaporizing unit, positively or negatively charged bubbles, which have a diameter of 1000 nm or less, are produced in the liquid material, and the liquid material is atomized to form a mist of the liquid material. The energetic charge may be set off as a part of a perforating operation.