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时间:2020-03-23
《介质加载谐振腔的小型化氢脉泽的研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第37卷第5期仪器仪表学报Vol37No52016年5月ChineseJournalofScientificInstrumentMay.2016介质加载谐振腔的小型化氢脉泽的研究1,21何克亮,张为群(1.中国科学院上海天文台上海200030;2.中国科学院大学北京100049)摘要:原子储存泡技术是氢微波激射器(氢脉泽)的关键技术。传统的石英薄壁储存泡位于TE011模的空心圆柱谐振腔的中心。为了缩小氢脉泽谐振腔和原子储存泡的体积采用了蓝宝石加载谐振腔取代传统的腔泡结构,并将蓝宝石晶体的内壁作为原子储存泡,分
2、析了脉泽工作状态的变化。为了消除蓝宝石加载腔的腔频率随温度的敏感变化(-60kHz/K)对脉泽自激振荡频率相对大的牵引效应,在蓝宝石加载谐振腔中再加载具有负介电常数温度系数的钛酸锶晶体,将腔频率温度系数近似地补偿到零。实现了采用介质加载谐振腔的氢脉泽的自激振荡,并通过锁相环实现氢脉泽对晶体振荡器的控制而形成稳定的频率源,-14短期稳定度指标在量级上达到了主动型氢原子钟(氢钟)的指标(1000s稳定度达1.5×10)。关键词:氢微波激射器;介质加载谐振腔;原子储存泡+中图分类号:TH714.14TM935.113文
3、献标识码:A国家标准学科分类代码:410.55Studyonminiaturizedhydrogenmaserwithdielectricloadedresonancecavity1,21HeKeliang,ZhangWeiqun(1.ShanghaiAstronomicalObservatory,CAS,Shanghai200030,China;2.UniversityofChineseAcademyofSciences,Beijing100049,China)Abstract:Theatomicstorage
4、bulbtechniqueisthekeytechnologyoftheactiveHmaser.Traditionalthin-walledquartzstoragebulbissituatedinthecenterofTE011modehollowcylinderresonancecavity.InordertoreducethevolumeoftheHmaserresonancecavityandatomicstoragebulb,thesapphireloadedresonancecavityisused
5、tosubstitutethetraditionalcavityandbulbstructureoftheHmaser;theinternalwallofthesapphirecrystalisusedastheatomicstoragebulb.TheoperationstatevariationoftheHmaserisanalyzed.Inordertoeliminatetherelativelylargepullingeffectofthesensingchangeofthecavityfrequency
6、vs.temperature(-60kHz/K)inthesapphireloadedcavityonthemaserselfexcitedoscillationfrequency,thestrontiumtitanatecrystalwithnegativepermittivitytemperaturecoefficientisloadedinthesapphireloadedresonancecavity,whichcompensatesthecavityfrequencytemperaturecoeff
7、icienttozeroapproximately.TheselfexcitedoscillationofthedielectricloadedresonancecavityHmaserisachieved;andaquartzcrystaloscillatorisslavedbytheHmaserthroughphaselockedloopexperimentally,andthestablefrequencysourceisobtained.Theshorttermfrequencystabilitya
8、chievesthespecificationofthestandardactiveHatomicclockwithinthesameorderofmagnitude(thestabilityreaches-141.5×10within1000s).Keywords:Hmaser;dielectricloadedresonancecavity;atomicstorageb
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