摘要
针对示波器接受光电信号时,横坐标显示的是扫描时间,不能直接分析信号频移量的问题,设计了铷原子的饱和吸收光谱实验,并在示波器上同步接收法布里-珀罗腔的干涉条纹和铷原子D2线的饱和吸收谱线信号.利用实验上观测到的87 Rb D2线F=2的6个饱和吸收峰和已知的铷原子超精细能级结构确定频率标尺,计算了85 Rb D2线吸收峰之间的频率差及法布里-珀罗干涉条纹的自由光谱范围.结果表明,实验上确定的频率标尺与理论相符,饱和吸收光谱可用于标定基态到激发态跃迁谱线的频移量,而通过饱和吸收光谱计算得到的自由光谱范围则可作为激发态能级跃迁的频率标尺,分析激发态能级跃迁的频移.
In order to solve the problem that the abscissa shows the scanning time,which can not directly analyze the signal frequency shift in the experiment when receiving the photoelectric signal via the oscilloscope,the saturation absorption spectrum experiment of rubidium atom was designed,and the interference fringe of the Fabry-Perot cavity and the saturation absorption spectrum signal of rubidium atom D 2 line were received simultaneously on the oscilloscope.Determining the frequency scale by the known ultrafine energy level structure of 87 Rb D 2 line and six saturated absorption peaks observed experimentally,was used to calculate the free spectrum range of the Fabry-Perot interference fringe and the six absorption peaks of 85 Rb D 2 line.The results showed that the calculated results by the experimentally determined frequency scale agree with the theory.Therefore,the saturated absorption spectrum can be used to calibrate the frequency shift of the transition spectrum between ground state and excited state,while the free spectral range calculated by the saturated absorption spectrum can be used as the frequency scale of the excited state energy level transition for analyzing the frequency shift between the excited levels transition.
作者
任博权
严祥安
刘耀武
段宝睿
郭周
REN Bo-quan;YAN Xiang-an;LIU Yao-wu;DUAN Bao-rui;GUO Zhou(School of Science,Xi an Polytechnic University,Xi an 710048,Shaanxi,China)
出处
《西北师范大学学报（自然科学版）》
CAS
北大核心
2018年第5期44-49,共6页
Journal of Northwest Normal University(Natural Science)
基金
国家自然科学基金资助项目(61405151)
关键词
饱和吸收光谱
铷原子D2线
自由光谱范围
频率标尺
saturated absorption spectroscopy
rubidium D 2 line
free spectral range
frequency scale
作者简介
任博权(1993—),女,河南鹿邑人,硕士研究生.主要研究方向为量子光学.E-mail:boquanren@163.com.
