温度对POP Rb原子钟性能影响的研究Study of the temperature effect on POP Rb atomic clock
薛文祥;陈江;杜志静;张首刚;
摘要(Abstract)：
从温度对缓冲气体碰撞频移和弛豫率的影响出发,对充有Ar和N2这2种缓冲气体的POP(pulsed optically pumped,脉冲激光抽运)汽泡式铷原子钟的温度特性进行了理论和实验研究。研究表明,Ar与N2的气压比为1.6时,60℃的线性温度系数为0;不同温度时,布居数差弛豫率1和相干弛豫率2各不相同,若1 2,则POP铷原子钟Ramsey条纹包络在微波场与原子跃迁失谐为0附近为凹陷,信噪比较差,反之,为凸起,信噪比较高。研究结果对设计POP原子钟的缓冲气体气压比和工作温度,以及提高POP原子钟的中长期稳定度有一定借鉴作用。
关键词(KeyWords)： POP铷原子钟;弛豫率;缓冲气体;Ramsey条纹
基金项目(Foundation): 国家自然科学基金重点资助项目(10834007);; 国家杰出青年科学基金资助项目(61025023)
作者(Author): 薛文祥;陈江;杜志静;张首刚;
Email:
DOI: 10.13875/j.issn.1674-0637.2012.03.001
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