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Proceedings Paper

Study on pulse width modulation of RF excited CO2 laser
Author(s): Juan Liu; Xiahui Tang; Yingxiong Qin; Hao Peng; Lin Li
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Paper Abstract

Aiming to the accuracy output laser power control of RF excited CO2 laser. A pulse width laser power modulating unit and corresponding experiments was studied. Hardware circuit based on TMS320F2812 microprocessor and software program based on CCS3.1 platform was designed. On condition of given working mode of the laser and laser power, when real laser power was detected as the feedback, appropriate ignition pulse, maintenance pulse, continuous working mode modulating pulse, pulse working mode modulating pulse was given to realize a loop control system for laser power. When the pulse width modulator was used to modulate the laser power, the modulating frequency can be modulated in the range of 5 Hz~5 KHz if the laser was working in pulse mode. And the laser power can be modulated in the range of 5%~95% of the maximum value at any mode with the fluctuate accuracy within ±2%.

Paper Details

Date Published: 21 October 2009
PDF: 9 pages
Proc. SPIE 7515, Photonics and Optoelectronics Meetings (POEM) 2009: Industry Lasers and Applications, 75150N (21 October 2009); doi: 10.1117/12.843333
Show Author Affiliations
Juan Liu, Huazhong Univ. of Science and Technology (China)
Xiahui Tang, Huazhong Univ. of Science and Technology (China)
Yingxiong Qin, Huazhong Univ. of Science and Technology (China)
Hao Peng, Huazhong Univ. of Science and Technology (China)
Lin Li, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7515:
Photonics and Optoelectronics Meetings (POEM) 2009: Industry Lasers and Applications
Dianyuan Fan; Horst Weber; Xiao Zhu; Dongsheng Jiang; Xiaochun Xiao; Weiwei Dong; Desheng Xu, Editor(s)

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