Atomic oscillator, electronic apparatus, and moving object

An atomic oscillator comprising:

• a cell which encapsulates metal atoms therein;
• a light source which generates light for irradiation of the cell;
• a light detecting section which detects light penetrating through the cell;
• a bias current control section which controls a bias current to be supplied to the light source based on intensity of light detected by the light detecting section;
• a storage section;
• and
• a bias current setting section which performs sweep processing of sweeping the bias current and storing on the storage section a value of the bias current and a value of the intensity of the light when the intensity of the light detected by the light detecting section shifts from a decrease to an increase and re-sweep determination processing of setting the bias current based on the value of the bias current stored on the storage section after the sweep processing, comparing the value of the intensity of the light detected by the light detecting section with the value of the intensity of the light stored on the storage section in a state where the bias current control section controls the bias current, and determining whether or not to perform the sweep processing again in accordance with a comparison result.