Atomic oscillator

A non-transitory computer-readable storage medium having a computer program stored therein, the computer program comprising instructions for causing a control device to execute a process, the control device controlling an atomic oscillator including a light generator configured to generate a first excitation light having a designed single wavelength and also generate a second excitation light containing two frequency components by performing frequency modulation at a designated frequency modulation power, an alkali metal atom gas cell to which the second excitation light containing the two frequency components is emitted while a frequency difference between the two frequency components is changed, and a measuring unit configured to measure a transmitted light amount through the alkali metal atom gas cell, the process being to

• calculate the frequency modulation power based on the distribution of the transmitted light amount with respect to the frequency difference between the two frequency components of the second excitation light measured every time the wavelength of the first excitation light and the frequency modulation power are changed by the light generator.