公开(公告)号：US10224686B2

公开(公告)日：2019-03-05

申请号：US15356763

申请日：2016-11-21

Applicant: GIGAPHOTON INC.

Inventor： Yasufumi Kawasuji ,  Naoya Takaoka ,  Toshio Yokozuka

IPC: H01S3/102 ,  H01S3/13 ,  H01S3/10 ,  H01L21/027 ,  H01S3/097 ,  H01L21/67 ,  H01S3/09 ,  H01S3/104 ,  H01S3/23 ,  H05G2/00 ,  H01S3/134 ,  H01S3/223 ,  H01S5/34 ,  H01S5/40

Abstract: A laser apparatus may include: an optical amplifier configured to amplify a laser beam outputted from a master oscillator; an optical-amplifier power supply configured to supply an alternating current for optical amplification to the optical amplifier; and a laser controller. The optical-amplifier power supply may include: an alternating current generation circuit including an inverter circuit configured to change output amplitude in accordance with a duty cycle, the alternating current generation circuit being configured to generate the alternating current from an output of the inverter circuit; and a power supply control circuit configured to hold control information defining correspondence relations between command values from the laser controller and duty cycles of the inverter circuit, determine a duty cycle corresponding to a command value received from the laser controller based on the control information, and provide the determined duty cycle to the inverter circuit.