Laser frequency locking based on the normal and abnormal saturated absorption spectroscopy of <sup>87</sup>Rb

Laser frequency locking based on the normal and abnormal saturated absorption spectroscopy of ⁸⁷Rb

Wan Jian-Hong, Liu Chang, Wang Yan-Hui^†,

Level system for the simple model. The two-level model (a) and three-level model (b) are shown. In the figure k, k₁, and k₂ are stimulated emission rates, s, s₁, and s₂ are spontaneous emission coefficients.