An Efficiency Improvement Driver for Master Oscillator Power Amplifier Pulsed Laser Systems

Processes

Fu-Zen Chen¹  Yu-Cheng Song²  Fu-Shun Ho² 

[1] Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807618, Taiwan;Department of Laser and Optical Modules, Industrial Technology Research Institute, Tainan 310401, Taiwan;

关键词: laser driver;    synchronous drive;    current source;    high efficiency;    pulsed laser;    MOPA;   

DOI  :  10.3390/pr10061197

来源: DOAJ

【 摘 要 】

The master oscillator power amplifier (MOPA) pulsed laser, one of the popular topologies for high-power fiber laser systems, is widely applied in industrial machining laser systems. In MOPA, the low-power pulsed laser, stimulated from a seed laser diode, is amplified by the high- power optical energy from pump laser diodes via the gain fiber. Generally, the high-power pump laser diodes are driven by lossy linear current drivers. The switched mode current drivers boost the driver efficiency but suffer from pulse energy consistency due to the current switching ripple. In this paper, a laser driver system that varies the switching frequency of current source to synchronize with pulsed laser repetition rate is analyzed and implemented. Experimental results are demonstrated using a 20 W pulsed fiber laser system.

【 授权许可】

Unknown