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(-60 k Hz/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,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(1 000 s稳定度达1.5×10-14)。
The atomic storage bulb technique is the key technology of the active H maser.Traditional thin-walled quartz storage bulb is situated in the center of TE011 mode hollow cylinder resonance cavity.In order to reduce the volume of the H maser resonance cavity and atomic storage bulb,the sapphire loaded resonance cavity is used to substitute the traditional cavity and bulb structure of the H maser;the internal wall of the sapphire crystal is used as the atomic storage bulb.The operation state variation of the H maser is analyzed.In order to eliminate the relatively large pulling effect of the sensing change of the cavity frequency vs.temperature（-60 k Hz / K） in the sapphire loaded cavity on the maser self-excited oscillation frequency,the strontium titanate crystal with negative permittivity-temperature coefficient is loaded in the sapphire loaded resonance cavity,which compensates the cavity frequency temperature coefficient to zero approximately.The self-excited oscillation of the dielectric loaded resonance cavity H maser is achieved;and a quartz crystal oscillator is slaved by the H maser through phase-locked loop experimentally,and the stable frequency source is obtained.The short-term frequency stability achieves the specification of the standard active H atomic clock within the same order of magnitude（the stability reaches1.5 × 10-14 within 1000 s）.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2016年第5期1164-1171,共8页
Chinese Journal of Scientific Instrument
