Rb原子饱和吸收光谱实验教学系统  

Experimental teaching system of Rb saturated absorption spectroscopy

作　　者：孙文博[1] 张慧云[1] 郑盟锟 王合英[1] 陈宜保[1] SUN Wenbo;ZHANG Huiyun;ZHENG Mengkun;WANG Heying;CHEN Yibao(Department of Physics,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学物理系,北京100084

出　　处：《实验技术与管理》2020年第8期154-161,194,共9页Experimental Technology and Management

基　　金：中央高校教育教学改革专项项目(58301100118,58301100719);清华大学实验室创新基金项目(53100700116,53100700119)。

摘　　要：饱和吸收光谱(saturated absorption spectroscopy,简称SAS)是一种常用的精密激光光谱技术,可用于消除光谱中的多普勒展宽。该技术是磁光阱实验体系的重要组成部分,是冷原子研究领域实验开展的基础。清华大学近代物理实验室自主设计和建设了饱和吸收光谱教学实验装置,并用于教学实践。使学生通过该实验学习理解原子能级、光谱展宽机制、吸收谱原理、微分谱应用方法等,并通过数据分析计算Rb原子气体温度、激发态寿命等,拓展眼界,启发兴趣,让学生对冷原子物理研究领域有更深入的理解。Saturated absorption spectroscopy(SAS)is a commonly used precise laser spectroscopy technology,which can be used to eliminate Doppler broadening in the spectrum.This technology is an important part of the magneto-optical well experimental system,and it is the basis of the experimental development in the field of cold atom research.The Modern Physics Laboratory of Tsinghua University has independently designed and built the saturated absorption spectrum teaching experimental device,which is used in teaching practice.Through this experiment,students can learn to understand atomic energy level,spectrum broadening mechanism,absorption spectrum principle,differential spectrum application method,etc.Through data analysis and calculation of Rb atomic gas temperature,excited state life,etc.,students’horizons are expanded,their interest is inspired,which enables students to get a deeper understanding of the field of cold atom physics research.

关 键 词：饱和吸收光谱 多普勒展宽 自然展宽 超精细结构 交叉峰 

分 类 号：O562.3[理学—原子与分子物理] G642.423[理学—物理]