Design And Research On Power Monitoring System Of High Power Solid State Laser

Solid-state lasers have the characteristics of small size,high power and convenient use.They are most widely used in laser processing.As the core component of laser processing,the output characteristics of the laser directly affect the quality and efficiency of the processing.Among all the parameters of the laser,the output power of the laser is the most basic technical index of the laser output characteristics,and its power stability is affected by many factors such as operating current,operating voltage,spot mode,and operating temperature.Therefore,the development of a monitoring system that can monitor the output power of the solid-state laser in real time without affecting the laser will significantly improve the yield of laser-processed products.At present,the most commonly used laser power detectors at home and abroad are: photoelectric type,pyroelectric type,body absorption type and calorimeter,etc.The measurement methods mainly include direct measurement method and indirect measurement of high reflector sampling.Based on the user's needs,this paper selects the appropriate measurement method,proposes the overall design of the system.This paper carries out theoretical analysis,experimental verification and hardware software design.Finally,a new high-power laser monitoring device is designed and realized.The main research content is as follows:(1)Analyze the research background and current situation of laser power monitoring system,and determine the research object and technical requirements of this paper according to actual engineering needs.(2)Analyze several different methods of measurement.Propose the overall design of the system by the tail mirror sampling method,and verify the basic principles theoretically and experimentally.Fully proved the feasibility of the tail mirror sampling method.(3)Design the hardware part of the system.Analyze the design ideas and functions of each module.Complete the selection and design of the main components.Design the outer casing to package the hardware,improve the integrity and ease of use of the system.(4)Design the software part of the system.Realize the function of human-computer interaction through software interface design,and integration of hardware resources by using data processing algorithm.Introduce the core algorithm of data processing,including the algorithm design of data reading,inspection and preservation process.(5)Perform error analysis of the system,introduce the error source of the system,and give a method to reduce the error.It is proved experimentally that the error of the system meets the project requirements.In order to realize the range-switchable function of the system,the calibration of the system's range is performed.