Research On Anti-radiation Plastic Optical Fiber

Today, with mature technology of Glass Optical Fiber (GOF), PlasticOptical Fiber (POF) is being much considered because of its low-cost,robustness and ease of manufacture and connection. And with thedevelopment of manned space flight and space technology in our country,POF has been the main communication transport medium. But thetransmission character of POF will be affected by the radiation in thespace environment. This requires much better anti-radiation performanceof POF.We analyze the physics and chemical changes after radiation andresearch the loss of POF, based on those research, we raise two designplan of anti-radiation POF: Metal copolymer and organic addition agentplans. Also, we have compounded the core materials of metal copolymerplan under lab conditions. This paper experimentalizes the radiationcharacter of POF. After researching the radiation loss and recovery ofthree POF materials, we find that three materials have all been hurtedforever under1kGy dose, and that the anti-radiation performance of PS isbetter than PC and PMMA. Based on this experiment, we haveexperimentalized the radiation performance of two PMMA POFs (one ismade by our lab and the other is a commercial POF) under1kGy dose. We find that the PMMA POF made by our lab whose cladding dopedPbO and that has been purified has the better performance, especially inthe low band, the POF made by our lab recovers fast to nearly the leverbefore radiation, but the commercial POF has been severely hurted.This paper also does the simulation work about anti-radiationperformance of POF. After SRIM simulation, we find:1) PS has the bestanti-radiation performance in the pure polymers, and then is PC, PMMAis the last one.2) When PMMA is doped by metallic ions and thedensities are0.15%、1.5%、7.5%, the ions of Pb class can improve theanti-radiation performance, and in some extent, the higher density, thebetter performance; but the ions of Fe class can reduce the anti-radiationperformance, and also in some extent, the higher density, the worseperformance.3) The OH ion doped in low density can not improve theanti-radiation performance much, but the medium and the high densitycan with increasing much inherent loss.This paper analyzes the anti-radiation performance of POFsystematically and comprehensively, raises two design plans, and obtainsmany important conclusions by experiment and simulation, all of thesemake guides to manufacture of anti-radiation POF.