PURPOSE: A laser generating apparatus is provided to obtains lots of energies using a single Q-switching mode without using high priced optical parts. CONSTITUTION: A laser generating apparatus is composed of a Q-switch(250) and a Q-switch driver(260). The Q-switch driver comprises a controller(261) which selects a mode of the Q-switch and a signal adjustor(262) which receives a signal according to the selected mode through the controller. The Q-switch driver comprises a delay controller(263) which controls pulse delay time between pulses of the Q-switch, a Q controller(264) which transfers the information of the signal adjustor and the information of the signal adjustor, and voltage regulator(265) which determines a value delivered to the Q-switch from the Q controller.
