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题名	新型脉冲CO<,2>激光器参数测试
作者	刘翠青
学位类别	硕士
答辩日期	2002
授予单位	中国科学院上海光学精密机械研究所
导师	程兆谷
关键词	高功率脉冲CO<,2>激光 PIE CO<,2>激光 Burst-mode技术 电极结构
其他题名	Measurements on parameter of a novel pulsed CO2 Laser
中文摘要	该论文主要从事国家自然科学基金资助项目:"脉冲群开关预电离技术实现巨脉冲CO<,2>激光输出研究"(批准号:60078017).众所周知,实现高功率脉冲CO<,2>激光输出具有十分重要的意义,弥补了连续CO<,2>激光器在许多领域中应用的局限,例如在对高热导和高反材料的焊接、切割及优化切边质量上,具有高平均功率、高峰值功率的脉冲CO<,2>激光器相对于连续激光器来说,能提供很好的能量利用效率.该论文的创新之一便是采用预电离脉冲群开关技术实现脉冲CO<,2>激光输出.此方法的优点有:输出具有高平均、高峰值功率的CO<,2>激光;具有连续和脉冲两种工作模式;脉宽可方便调节等.
英文摘要	This paper is based on the project supported by the National Natural Science Foundation of China, which is "Study on the technique of pulsed burst-mode switch to realize huge pulsed CO2 laser output"(Grant No. 60078017). As is well known that realization of the high-power pulsed laser is very interesting, and it has many virtues that the CW laser doesn't have, for example several material-processing applications, like cutting and welding of high-thermal conductivity and high-reflectivity materials, improvement in cut-edge quality, etc. The pulsed CO2 laser with high-average and high-peak power can give better laser energy utilization efficiency when compared with CW laser. One of the creative points of the paper is employing the preionized pulsed-mode switcded technique to realize pulsed CO2 laser output. The method has many virtues, such as high-average and high-peak power laser, operation at both CW and pulsed mode, and the adjustable pulse-width etc. The core idea is utilizing preionized pulsed-mode as a switch to control the main discharge, which can control the pour-in of the main discharged pulse with scores of kilowatt or even more, only by modulating the preionized pulsed-mode train with several hundred average power. And the final aim is to realize the pulsed CO2 laser output, energy with tens of Joule per pulse, pulse-width adjustable at the range of sub-millisecond or millisecond, and 100% modulation depth. Another of the creative points rests with our experimented transverse-flow CO2 laser with unique electrode structure, which has the virtues of cheap cost, large pour-in power per volume, and easy fabrication of the power supply. Author's main works are the measurements on parameter of a novel pulsed CO2 laser, including measurements on the wave shapes of the voltage, current and light at the different processes such as preionization, main discharge and light output, the light modulation depth measurement and preionization power supply improvement. This paper includes six chapters in all. Chapter One is introduction. Chapter Two mainly demonstrates various kinds of preionization technology for high-power CO2 lasers, especially for the PIE CO2 laser. Chapter Three presents Burst-mode technique. Chapter Four introduces the transverse-flow CO2 Laser with unique electrode structure in our experiment, including the improvement for preionizaiton power supply. Chapter Five is the core of the paper-measurements on the parameters. Chapter Six is conclusion.
语种	中文
内容类型	学位论文
源URL	[http://ir.siom.ac.cn/handle/181231/16451]
专题	上海光学精密机械研究所_学位论文
推荐引用方式 GB/T 7714	刘翠青. 新型脉冲CO<,2>激光器参数测试[D]. 中国科学院上海光学精密机械研究所. 2002.

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