A system and method for assembling multiple multicast data packets into a multicast burst according to multiple multicast burstification classes and switching the multicast burst through an optical burst switched network. The inserts are arranged to be disposed within respective lumens or channels in the wall of the myocardium. The lead frame has a first lead frame fixing the light emitting chip and a second lead frame connected to the light emitting chip by the wire bonding. As a result, when judging the workpiece has reached a desired machining state, laser machining is finished if the number of times of laser machining has not reached the set number of laser pulse outputs.