The Research Of Driver And Characteristics Of AOM Of CO₂ Laser

The CO₂ laser is widely applied for its excellent capability in the area of the low power laser process. And optic electricity technology meets the need of laser process for which can focus the laser beam on a diffraction limit spot, control the frequency, direction and intensity of laser beam very fast and efficiently. Nowadays, electro-optic modulation technology was used on the CO₂ laser generally to get the pulse of which the width is just hundreds of seconds, that is hardly to meet the need of special laser process area. And secondly the CO₂ laser can't get high response speed that usually employs continuous DC charged excited technology. If the acoustic-optic modulation technology is employed, we can get short and high intensity pulse, and achieve high response speed. So AOM technology of CO₂ laser is discussed in this thesis.At first, the concept and class of laser modulation and application of acoustic-photo modulation is presented. And then based on the theory of the interaction of acoustic wave and optic wave, the Raman-Nath and Bragg diffraction are introduced in detail, of which theoretical model is given. Later, the structure and key parameter of acoustic-photo modulator are presented.Now, the research of acoustic-photo modulation technology almost uses the high frequency generator as the driver of acoustic-photo modulator, and the study and design of driver is seldom reported in literature. Based on the condition of my library, the design method and related result of experiment of the model AGM-406B1M infrared acoustic-optic modulator RF power are given based on the parameter in this thesis.After the theory presenting and design of the driver, the research and simulation of amplitude modulation, frequency shifting, and deflection of AGM-406B1M infrared acoustic-optic modulator is presented at last.