公开(公告)号：US20230398627A1

公开(公告)日：2023-12-14

申请号：US18454235

申请日：2023-08-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： YUJI ISOMOTO ,  KENKI KOYAMA

IPC: B23K26/0622

CPC classification number: B23K26/0622

Abstract: Laser oscillator (10) includes semiconductor laser light source (21), drive power source (22) that drives the semiconductor laser light source with voltage of capacitor (24) charged, switch unit (23) that switches a voltage supply state from external power source (40) to the capacitor, and controller (30) that controls switching of the switch unit. The controller has a model representing a known relationship between a discharge time that is an elapsed time after supply of voltage from the external power source to the capacitor is stopped, and a required preliminary-charge time that is a time required for the capacitor to obtain a shortage of voltage required to drive the semiconductor laser light source. The controller derives the required preliminary-charge time from the discharge time based on the model to perform mode switching from the stop mode to the preliminary-charge mode, and then performs mode switching from the preliminary-charge mode to the drive mode after the required preliminary-charge time elapses.