Research of adaptive regulation of shaping optics in radio frequency slab CO2 lasers

WANG Zhen; HAN Mengmeng; PENG Hao; TANG Xiahui

doi:10.7510/jgjs.issn.1001-3806.2015.04.009

In order to solve the problem of the output beam offsets induced by assembling and heat distortion of mirrors in radio frequency slab CO2 lasers, offsets were compensated by means of the outside optics. An offset compensation device was designed based on piezoelectric ceramics. Piezoelectric ceramics actuators were designed and the control accuracy and adaptive control method were analyzed. The results show that laser output power at any duty ratio can meet or exceed the standard reference power value after compensation. The maximum difference of output power is 100W before and after adaptive regulation and the laser output power fluctuation is less than 2% during the running of 2h. The output beam compensation can ensure laser run efficiently, increase the stability of laser power and laser mode. The research has the high practical value.

Research of adaptive regulation of shaping optics in radio frequency slab CO2 lasers

Corresponding author: TANG Xiahui, txh1116@hust.edu.cn

1. National Engineering Research Center for Laser Processing, School of Optical and Electronic Information, Huazhong University of Science & Technology, Wuhan 430074, China;

2. School of Electrical and Information Engineering, Wuhan Institute of Technology, Wuhan 430071, China

Received Date: 2014-07-25

Accepted Date: 2015-02-08

Available Online: 2015-07-25

Abstract: In order to solve the problem of the output beam offsets induced by assembling and heat distortion of mirrors in radio frequency slab CO2 lasers, offsets were compensated by means of the outside optics. An offset compensation device was designed based on piezoelectric ceramics. Piezoelectric ceramics actuators were designed and the control accuracy and adaptive control method were analyzed. The results show that laser output power at any duty ratio can meet or exceed the standard reference power value after compensation. The maximum difference of output power is 100W before and after adaptive regulation and the laser output power fluctuation is less than 2% during the running of 2h. The output beam compensation can ensure laser run efficiently, increase the stability of laser power and laser mode. The research has the high practical value.

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Reference (16)

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Research of adaptive regulation of shaping optics in radio frequency slab CO2 lasers

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