消多普勒饱和吸收激光稳频教学实验平台

Experimental platform for laser frequency stabilization teaching with Doppler saturation absorption elimination

激光器是原子磁强计、原子陀螺仪等量子传感器的核心部件。量子传感器通过激光、磁场等与原子的相互作用,实现对相应物理量的高精度测量。激光频率优化及稳定是实现量子精密测量的关键技术。该文在理解原子能级跃迁、激光饱和吸收稳频原理基础上,搭建了消多普勒激光饱和吸收稳频教学实验平台,通过扫描铷原子的消多普勒饱和吸收光谱,将激光频率锁定在铷原子的D1线上,获得了频率高度稳定的激光输出。该平台能够使学生直接观测原子吸收与激光频率稳定的过程,有助于学生对激光与原子相互作用的深入理解以及实验动手能力的提升,为研究生和本科生的相关课程教学提供了有力支撑。

Laser is the core component of quantum sensors such as atomic magnetometer and atomic gyroscope.Quantum sensors achieve high-precision measurement of corresponding physical quantities through the interaction between lasers,magnetic fields,and atoms.Laser frequency optimization and stability are key technologies for achieving quantum precision measurement.On the basis of understanding the atomic energy level transition and the principle of laser saturated absorption frequency stabilization,this paper built a teaching experimental platform for Doppler free laser saturated absorption frequency stabilization.By scanning the Doppler free saturated absorption spectroscopy of rubidium atoms,the laser frequency was locked on the D1 line of rubidium atoms,and the laser output with highly stable frequency was obtained.This platform enables students to directly observe the process of atomic absorption and laser frequency stability,which helps them to have a deep understanding of the interaction between laser and atoms and improve their experimental hands-on abilities.It provides strong support for the teaching of related courses for graduate and undergraduate students.