SEMICONDUCTOR LASER DRIVE CIRCUIT AND LASER WELDING POWER SUPPLY

PROBLEM TO BE SOLVED: To provide a semiconductor laser drive circuit capable of freely setting up a profile. SOLUTION: This invention relates to the semiconductor laser drive circuit which processes an irradiated body by irradiating a laser beam, while causing a laser output to be a predetermined set value by carrying out a feedback control, wherein the set value is a laser drive current value corresponding to the laser output of the semiconductor laser, characterized by a function of a laser irradiation time duration. This set value is characterized by being set up, by receiving a designation value consisting of a laser irradiation elapsed time and laser outputs at the time point, and by connecting these laser outputs in an order of the laser irradiation elapsed time by a straight line, and by carrying out a linear interpolation during this period to compute the laser outputs, and by converting this computed value to the corresponding laser drive current value. COPYRIGHT: (C)2009,JPO&INPIT