Design And Optimization Of Optical Abutment For Airborne Laser Communication

With the continuous development and maturity of space laser communication technology,laser communication has become one of the important means to construct space information networks.Laser communication has the advantages of low power consumption,light weight,small size,high data transmission rate,good confidentiality and strong anti-electromagnetic interference ability.In recent years,laser communication has received widespread attention.This article has carried out the following research on the optical base station in the airborne laser communication system:The composition of the airborne laser communication system and the external working environment such as thermal load,atmospheric channel and vibration load are analyzed.Based on the analysis results,the overall plan and key technologies of the optical base station of the airborne laser communication system are proposed.The structural design of the pointing mirror assembly is completed.Focusing on the environment of large temperature difference,the optimized design of the thickness of the adhesive layer of the reflector was carried out,the mathematical model of the relationship between the bonding parameters and the surface shape was established,and the modal analysis and thermal-mechanical coupling simulation analysis were completed.The temperature was-20℃～40℃,1g Under the conditions of gravity,the reflector’s surface shape reaches better than the index requirements,and the random vibration test is carried out,which meets the requirements of the airborne laser communication system.Completed the structural design of the relay optical antenna.Focusing on the analysis of the axial displacement of the optical antenna in a large temperature difference environment,the mathematical model of the thermal compensation structure is established.The thermodynamic analysis results show that the axial displacement of the optical antenna tube after compensation is at-20℃ and 40℃ respectively.0.061 mm and 0.028 mm are reduced to 0.0103 mm and 0.007 mm,meeting the system requirements.The structure design of the light splitting optical path has been completed.Design and optimize the structure of the five optical paths and the mounting plate of the suboptical path unit.Analyze the error sources that may occur during the assembly and adjustment process and propose the corresponding assembly and adjustment plan.