Power measure and control system for high power laser in real-time

Bo Li; Youqing Wang; Dengfeng Peng; Qing Li

doi:10.1117/12.790873

22 February 2008 Power measure and control system for high power laser in real-time

Bo Li, Youqing Wang, Dengfeng Peng, Qing Li

Proceedings Volume 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology; 66221B (2008) https://doi.org/10.1117/12.790873
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

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.

Citation Download Citation

Bo Li, Youqing Wang, Dengfeng Peng, and Qing Li "Power measure and control system for high power laser in real-time", Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 66221B (22 February 2008); https://doi.org/10.1117/12.790873

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