消多普勒饱和吸收激光稳频教学实验平台

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.