Study On Thermal Properties And Anti-radiation Properties Of EDFA Gain Fiber Thermal Conductive Adhesive For Satellite Optical Communication

Erbium-doped fiber amplifier(EDFA)is one of the key devices often used in space optical communication.In the space environment,while ensuring a high optical power output,it is inevitable that a large amount of heat will accumulate to make it work at a high temperature,which will affect the working state.In order to increase its heat dissipation capacity,thermal conductive silicone rubber is often used in engineering to wrap it in the form of conduction heat dissipation.In this paper,the influence of thermal conductive silicone rubber on the temperature field distribution of EDFA gain fiber is studied by finite element method.In the finite element simulation,the optical amplifier module structure model and mathematical analysis model are constructed.And will solve the thermal conductivity silicone rubber,structural adhesive E-01 and non-colloid,EDFA temperature field simulation in three cases in the optical amplifier module,analysis and comparison of the simulation results,thermal adhesive in the work to reach the steady state time is shorter,the temperature is lower,obviously better than non-colloid and structural adhesive E-01 conclusion.Because the thermal conductivity silicone rubber may be affected by space irradiation,the thermal conductivity,mechanical properties and internal structure changes of the thermal conductivity silicone rubber under gamma ray irradiation were studied in this paper.The experimental results show that the thermal conductivity,mechanical properties and internal structure of the thermal silicone rubber have changed in different degrees after experiencing different doses of gamma ray irradiation.The thermal conductivity will decrease with the increase of radiation dose when the radiation dose is low,and gradually recover with the increase of radiation dose when the radiation dose reaches 60 krad.The elongation at break and tensile strength of mechanical properties will gradually decrease with the increase of radiation dose,while the hardness and density are not affected by radiation dose.The internal structure of thermal conductive silicone rubber will increase with the increase of radiation dose,in which the change of chemical bond content is not obvious,and no new functional groups are generated.After annealing for a period of time,the elongation at break and the tensile strength of the thermal conductivity and mechanical properties of the samples have recovered to different degrees.