Patent ID: 8593229

Claim:
An atomic oscillator, comprising: a gas cell in which a gaseous metal atom is sealed; heating units heating the gas cell to a controlled temperature and being a first heater and a second heater; a light source of exciting light exciting the metal atom in the gas cell; a light detecting unit detecting the exciting light which has passed through the gas cell; a substrate including at least a temperature controlling circuit for the heating units; a first heater wiring coupling the first heater and the substrate; a second heater wiring coupling the second heater and the substrate; and a third heater wiring coupling the first heater and the second heater, wherein the gas cell includes a cylindrical portion; and windows which constitute an incident surface and an emitting surface on an optical path of the exciting light, wherein the first heater and the second heater are respectively formed on the windows at an incident surface side and an emitting surface side and made of transparent heating materials, wherein the third heater wiring is formed on the cylindrical portion and serves as a heater.