Optical module for atomic oscillator and atomic oscillator

1. An optical module for an atomic oscillator using a quantum interference effect, comprising:

a light source adapted to emit light including a fundamental wave having a center wavelength, and sideband waves of the fundamental wave;

a wavelength selection section receiving the light from the light source, and adapted to transmit the sideband waves and to reduce the fundamental wave out of the light input;

a gas cell encapsulating an alkali metal gas, and irradiated with light transmitted through the wavelength selection section; and

a light detection section adapted to detect an intensity of light transmitted through the gas cell,

wherein the wavelength selection section includes:

an etalon, and

a temperature control section adapted to control temperature of the etalon.

2. The optical module for an atomic oscillator according to claim 1 , wherein,

the temperature control section includes a resistive element, and controls the temperature of the etalon by controlling a current to be applied to the resistive element.

3. The optical module for an atomic oscillator according to claim 1 , wherein,

the light source is a surface emitting laser.

4. The optical module for an atomic oscillator according to claim 1 , further comprising:

an optical element adapted to make the light emitted from the light source enter the etalon.

5. An atomic oscillator comprising:

an optical module for an atomic oscillator according to claim 4 ; and

a frequency control circuit.

6. An atomic oscillator comprising:

an optical module for an atomic oscillator according to claim 1 ; and

a frequency control circuit.

7. An atomic oscillator comprising:

an optical module for an atomic oscillator according to claim 2 ; and

a frequency control circuit.

8. An atomic oscillator comprising:

an optical module for an atomic oscillator according to claim 3 ; and

a frequency control circuit.