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^†,

Experimental schematic diagram. DFB: distributed feedback laser, λ/2: half wave plate, PBS: polarizing beam splitter, BS: beam splitter, Rb: cell the rubidium cell, PD: photodiode. Part (a) is the experimental setup of the abnormal saturated absorption spectroscopy. Part (b) is the experimental setup of the normal saturated absorption spectroscopy.