| With the increasing complexity of the battlefield environment and the high security requirements of weapon systems,laser ignition technology has become a hot spot in recent years due to its inherent safety.Applied to weapon systems,with the ability to respond quickly and the advantages of low-energy ignition,semiconductor laser ignition systems are very suitable for various types of weapon systems because they are not subject to static electricity and electromagnetic interference.The main function of laser ignition system is to realize light energy transmission and its interaction with energetic materials,aiming at the optical energy loss characteristics and optimization problems of light window ignition under laser ignition system,this paper analyzes and optimizes the optical energy loss characteristics of different light devices of laser ignition system based on different laser ignition structure ignition experimental data,combined with Comsol and Zemax simulation software,so as to provide reference for low-energy ignition of laser ignition system.The main work of the thesis is:（1）According to the actual application needs of the light window laser ignition system construction,mainly including semiconductor lasers,light fiber transmission components and light window laser igniter,the main advantage of this system is to meet the fire demand under the premise that the light fiber can be reused,the cost is low.（2）For the experimental comparison of boron/potassium nitrate in light window type and fiber tail laser igniter,it is found that although the fiber tail laser igniter can achieve low-power ignition in terms of ignition power,the degree of damage to the optical fiber is large and cannot be reused.Zemax software is used to simulate the optical path of the optical path in the laser ignition system,and the optical components of the transmission path and the possible loss problems are simulated and analyzed.It mainly includes the loss caused by the end face deviation between the optical fiber and the optical fiber through the connection flange,the influence of the assembly distance between the focusing lens and the optical fiber on the transmission efficiency,the loss caused by the light window material and reflection,etc.And optimize the treatment of the problems involved.（3）The optimized window laser ignition system was used to conduct ignition experimental research,and the parameters of B/NO3 nitrate charge,including the type and fraction of binder,the addition of carbon materials and the influence of the sealing properties of the laser igniter on its ignition performance.Thus,the low-power ignition research of B/NO3in the structure of the window laser igniter is realized.And when the ratio of B/NO3 nitrate is 3:7,the binder phenolic resin is 3%and 3%carbon black,the laser igniter can be sealed to obtain an average ignition power of 3.8W and a minimum ignition delay time of 0.01s. |
