Importance

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Abstract

An atomic oscillator of the present disclosure includes: a gas cell in which alkali metal atoms are encapsulated; a light generator that applies an irradiation light having at least two different frequency components to the gas cell; a light detector that detects a transmitted light having transmitted by the gas cell; and a controller that determines a resonance frequency of the alkali metal atoms based on a light amount of the transmitted light by the gas cell and controls an oscillation frequency based on the determined resonance frequency. The irradiation light is applied by two irradiation methods in which characteristics of change in the resonance frequency due to change in intensity of the irradiation light are mutually different. The controller controls the oscillation frequency based on a result of comparison between the resonance frequencies when the irradiation light is applied to the gas cell by the two irradiation methods, respectively.

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First Claim