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ID:36406883
大小:10.33 MB
页数:132页
时间:2019-05-10
《石英玻璃及石英光纤的抗辐射性能研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、武汉理工大学博士学位论文石英玻璃及石英光纤的抗辐射性能研究姓名:邓涛申请学位级别:博士专业:材料学指导教师:谢峻林20100401武汉理工大学博士学位论文芯单模光纤。同时评估了一种普通多模光纤在不同辐照条件下抗辐射能力。光纤的折射率剖面测试结果表明,即使较高剂量(10kGy/hxloh)的Gamma射线辐照也不会对光纤的波导结构造成明显影响。此外,结合ESR结果给出了光纤中引起辐致吸收的缺陷的转变过程,得到了单模光纤在1550nm、多模光纤在1300nm波段的辐致损耗与辐照条件之间的函数关系,借由此关系可以对光纤的抗辐射能力给出预估。(4)研究纯硅芯单模光纤以及氟锗共掺单模光纤的抗辐射性能对
2、拉丝工艺的依赖性发现,前者受拉丝工艺影响较大,后者受拉丝工艺影响小,因而更适合规模生产。对比单独载氢以及预辐照结合载氢对光纤抗辐射性能的优化效果,结果表明预辐照结合载氢更有助于改善光纤的抗辐射性能。这对于图象传输用光纤具有较大意义。关键词:石英玻璃,光纤,抗辐射,缺陷,辐致损耗II武汉理工人学博士学位论文AbstractInrecentyears,theapplicationsofsilicaglassandsilicaopticalfibresintheradiationenvironmentarousedextensiveattentionoftheresearchers.Therear
3、edifferentopinionsoftheinfluenceofmaterialstructureontheradiationresistancepropertiesofsilicaglassandsilicaopticalfibres.Argumentsareneverstoppedontheradiation.induceddefectindifferentradiationconditions.Inthisdissertation,thepuresilicaglass,dopedsilicaglassandopticalfibresfabricatedwithPCVDprocess
4、aretakenasthestudyobjects.inordertofurtherstudytheradiation—induceddefeetmechanismandconcernedinfluencefactors,tolayafoundationfortheproductionofhighqualityradiationresistanceopticalfibres.Thedopantinfluencesonthestructureofsilicaglassandradiationresistancepropertiesareresearched.Theradiationresist
5、ancepropertiesofopticalfibreswithdifferentstructuresarecompared.Therelationshipbetweenradiation-inducedlossesofopticalfibresandradiationconditionsisstudied.Theimprovementofopticalfibre’SradiationresistancepropertiesiSconsideredaswell.Themaincontentsandconclusionsareasfollows:(1)ByanalyzingtheSi—Fbo
6、ndvibrationabsorptionbandsfi'omtheinfra‘redspectrumandRamanspectrumofFluorinedopedsilicaglass,itWasfoundthatFluorineexistsinsilicanetworksastheformationof【Si03F].TheintroductionofFluorinewillincreasetheprobabilityofbondbroken,anddecreasethestructuresof3-foldringsand4-foldrings.Consequently,theradia
7、tionresistancepropertiesofsilicaglasswillbeimprovedwiththeincreaseoftheFluorinedopedquantity.Accordingtothe阱VISspectrumcombinedwithESRtestresults,theabsorptionsofthepuresilicaglassanddopedsilicaglassin200to
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