Research Of Laser Multi Parameter Instability And Correction System

With the rapid development of laser industry,laser processing has been widely used in various industries,high-precision laser processing equipment and measuring equipment have developed rapidly and been widely used.Laser parallel manufacturing has many advantages,such as high efficiency,but in the process of laser parallel manufacturing,the dynamic interference of laser beam will affect the accuracy and stability of laser parameters,and then directly affect the performance of laser parallel manufacturing system.Based on the key R & D plan of the Ministry of science and technology-laser parallel manufacturing technology and equipment,this paper mainly studies the laser parameter monitoring and correction system part of the project,in which the laser parameters include the directivity,power,beam quality,etc.Therefore,this paper studies how to design and build laser parameter monitoring and correction system.In addition,this paper studies how to improve the correction accuracy of the system,and in order to better achieve the research objectives,some factors that cause the instability of laser beam parameters and the specific influence range are also studied.It mainly includes the following parts:1.The research background and significance of laser parameter instability and correction technology are summarized.The research and summary of laser parameter instability and correction technology at home and abroad are carried out.2.The theoretical model of laser parameter instability and correction method is introduced.The theoretical models of laser beam pointing instability,power instability and beam quality instability are described.The structure and measurement principle of several measuring instruments commonly used in laser beam pointing correction are described.3.Firstly,the CCD camera,power meter and beam quality analyzer are used to study the beam pointing instability and power instability of the mode-locked laser,and the specific instability values are obtained.Secondly,the beam pointing instability,power instability and beam quality instability of the regenerative laser are studied by the above instruments Finally,using origin and MATLAB to fit and simulate the relevant data,three-dimensional display of picosecond laser power and pointing instability under different pump power,ambient temperature.4.In this chapter,the detector used in the laser parameter monitoring and correction system is selected;then,the system light path diagram and device design are described in detail;finally,the directivity monitoring and correction function of the system is verified by using short cavity and regenerative amplification cavity,and the correction accuracy(angle deviation and position deviation)of the short cavity is0.0027 mrad The correction accuracy(angle deviation and position deviation)of the regenerative amplification cavity is 0.0091 mrad and 0.019 mm.