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卤素气体的消耗和激光介质纯度的降低是影响医用准分子激光器激光能量稳定性和激光介质使用寿命的主要因素。为提高激光能量稳定性和激光介质使用寿命,在激光器供气系统上增加激光介质实时补给装置,采取基于FPGA的控制系统将补给少量卤素气体和更换部分混合型激光介质等操作有效组合起来,经仿真验证,该控制系统能实现激光介质实时补给功能,可有效提高激光能量稳定性和激光介质使用寿命,且控制精度高,操作方便,扩展应用性强。
The consumption of halogen gas and the decrease of the purity of the laser medium are the main factors affecting the laser energy stability and the service life of the laser medium of the medical excimer laser. In order to improve the stability of laser energy and the service life of laser medium, laser real-time replenishment device is added to the laser air supply system. The control system based on FPGA is used to effectively combine the operation of supplying a small amount of halogen gas and replacing a part of hybrid laser medium. Simulation results show that the control system can realize the real-time replenishment function of the laser medium, which can effectively improve the laser energy stability and the service life of the laser medium. The control precision is high, the operation is convenient, and the expansion and application are strong.