一种原子气室缓冲气体压强的测量方法
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摘要
在被动型CPT(相干布居数囚禁)原子钟中,缓冲气体、C场主要作用是改善原子钟信号的特性,但同时会对碱金属原子能级产生扰动,引起CPT共振信号频率的偏移,通过建立被动型CPT原子钟频移量的理论模型,并基于被动型CPT原子钟建立频移量测量系统,对缓冲气体和C场等因素引起的频移量进行测量,并通过数值计算,得到被动型CPT原子钟气室缓冲气体压强。
For passive CPT atomic clock,the core function of the buffer gas and the C field is to improve the signal to noise ratio of the atomic clock signal,at the same time,the buffer gas and C field will disturb the energy level of the alkali mental atom and cause small shifts of CPT signal resonance frequency.We set up the theoretical model for the frequency shift of passive CPT atomic clock and a frequency shift measurement system for the CPT atomic clock based on the passive CPT atomic clock test system.And we measure the frequency shift caused by the buffer gas and the C field and we obtain the buffer gas pressure by numerical calculation.
For passive CPT atomic clock,the core function of the buffer gas and the C field is to improve the signal to noise ratio of the atomic clock signal,at the same time,the buffer gas and C field will disturb the energy level of the alkali mental atom and cause small shifts of CPT signal resonance frequency.We set up the theoretical model for the frequency shift of passive CPT atomic clock and a frequency shift measurement system for the CPT atomic clock based on the passive CPT atomic clock test system.And we measure the frequency shift caused by the buffer gas and the C field and we obtain the buffer gas pressure by numerical calculation.
引文
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[11]STEC D A K.Cesium D line data[R].Oregon:University of Oregon,2010.
[12]VANIER J.The passive optically pumped Rb frequency standard:the laser approach[J].Applied Physics Laser and Optics,2007,B87(4):1346-1351.
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[15]杨仁福,高连山.国外微型CPT原子钟的最新进展[D].北京:2008全国频率控制技术年会论文集,2008:113-120.
[2]VANIER J.Atomic clock based on coherent population trapping:a review[J].Applied Physics Laser and Optics,2005,B81:421-442.
[3]王义遒,王吉庆,董太乾,等.量子频标原理[M].北京:科学出版社,1986.
[4]VANIER J.The passive optically pumped Rb frequency standard:the laser approach[J].Applied Physics Laser and Optics,2007,B87:565-593.
[5]王鑫,范琦,杜志静,等.激光参量对CPT铷原子钟稳定度影响的数值分析[J].时间频率学报,2008,31(2):86-91.
[6]VANIER J.Atomic clock based on coherent population trapping:a review[J].Applied Physics B,2005,B81(4):421-442.
[7]VANIER J.Coherent population trapping for the realization of a small stable atomic clock[C]//IEEE International Frequency Control Symposium&PDA Exhibition,2002:424-434.
[8]VANIER J.Coherent population trapping in cesium:dark lines and coherent microwave emission[J].Phsyical Review A,1998,58(3):2345-2358.
[9]VANIER J,AUDOINR C.The Quantum Physics of Atomic Frequency Standards[M].England:A.Hilger,1989.
[10]VANIER J.Practical realization of a passive coherent population trapping frequency standard[J].IEEE Transactions on Instrumentation&Measurement,2004,54(6):92-99.
[11]STEC D A K.Cesium D line data[R].Oregon:University of Oregon,2010.
[12]VANIER J.The passive optically pumped Rb frequency standard:the laser approach[J].Applied Physics Laser and Optics,2007,B87(4):1346-1351.
[13]VANIER J.On the use of intensity optical pumping and coherent population trapping techniques in the implementation of atomic frequency standards[J].Transactions on Instrumentation&Measurement,2001,52(3):822-831.
[14]ROSENBLUH M,SHAH V,KNAPPE S,et al.Differentially detected coherent population trapping resonances excited by orthogonally polarized laser fields[J].Optics Express,2006,14(15):6588-6594.
[15]杨仁福,高连山.国外微型CPT原子钟的最新进展[D].北京:2008全国频率控制技术年会论文集,2008:113-120.