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Proceedings Paper

Power measure and control system for high power laser in real-time
Author(s): Bo Li; Youqing Wang; Dengfeng Peng; Qing Li
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Paper Abstract

A new kind of measure and control system for high power CO2 lasers in real-time is designed in order to improve stabilization and accuracy of lasers power, and includes tow parts, one is the sample unit, made of a rear mirror, an integrating sphere and an infrared detector, the other one is the and feedback control unit made of a PID controller. This system adjusts output power of the lasers and makes the laser power stable in the required scope by the closed-loop control system according to the feedback of laser power signal, which depends on the sampling of laser power transmitted out of the rear mirror of the resonator. This system can detect and monitor the laser power on line and has no influence on the output laser beam. It greatly enhances the stabilization (<±0.3%) and accuracy of the control. Furthermore, it has such advantages as: compact construction, high stable performance and fast response and no need to intercept the output laser beam just as the monitor with rotating pin sampling.

Paper Details

Date Published: 22 February 2008
PDF: 6 pages
Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 66221B (22 February 2008); doi: 10.1117/12.790873
Show Author Affiliations
Bo Li, Huazhong Univ. of Science and Technology (China)
Youqing Wang, Huazhong Univ. of Science and Technology (China)
Dengfeng Peng, Huazhong Univ. of Science and Technology (China)
Qing Li, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 6622:
International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology

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