Rb-87原子密度的测量与激光放大器的制作

发布时间：2018-03-23 23:19

本文选题：原子密度　切入点：Rb-87原子蒸汽　出处：《华东师范大学》2015年硕士论文

【摘要】：原子密度在量子信息、非线性光学和精密测量等领域中是一个比较基本和重要的参数,Rb-87的原子系综经常被选用作为精密测量或者量子信息实验中的原子介质。虽然已经有很多人利用很多方法研究及测量原子的密度或者饱和蒸汽压,例如吸收法、热平衡法、法拉第法和荧光法等。但是直到现在仍然没有具体的实验测量中档温度状态下的铷原子的密度或者饱和蒸汽压。本论文测量了293-334K温度范围内Rb-87的原子密度,这一区间是量子信息、精密测量等实验最常用的温度,为了得到精确的实验结果,我们在以往荧光法的基础上考虑了荧光的吸收现象、能级的衰减等因素,对实验方案有了进一步改进,结合了荧光、原子碰撞弛豫、光泵浦和补偿吸收等方法精确的测量了铷原子的密度数,根据实验结果给出了理论分析和具体的原子密度拟合公式曲线。
[Abstract]:Atomic density in quantum information, Atomic ensemble, which is a relatively basic and important parameter in the fields of nonlinear optics and precision measurement, is often used as an atomic medium in precision measurement or quantum information experiments. The study and measurement of atomic density or saturated vapor pressure by multiple methods, For example, the absorption method, the thermal equilibrium method, Faraday method and fluorescence method, etc., but until now there is no specific experiment to measure the density or saturated vapor pressure of rubidium atom at intermediate temperature. In this paper, we measured the atomic density of Rb-87 in the range of 293-334K. This range is the most commonly used temperature in experiments such as quantum information and precision measurement. In order to obtain accurate experimental results, we have taken into account the absorption phenomenon of fluorescence and the attenuation of energy levels on the basis of previous fluorescence methods. The experimental scheme is further improved by combining fluorescence, atomic collision relaxation, optical pumping and compensated absorption to accurately measure the density of rubidium atoms. According to the experimental results, the theoretical analysis and the specific curve of atomic density fitting formula are given.
【学位授予单位】：华东师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN722;O562

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