Quantum interference device, atomic oscillator, electronic apparatus, and moving object
An atomic oscillator includes an atomic cell in which alkali metal atoms are encapsulated, a light source section configured to receive the supply of a bias and emit light including a resonance light pair for causing the alkali metal atoms to resonate, a temperature adjusting element configured to adjust the temperature of the light source section, a bias detecting section configured to detect information concerning the bias, and a light-source-temperature control section configured to control the temperature adjusting element using the information detected by the bias detecting section.
1. A quantum interference device comprising:
an atomic cell in which metal atoms are encapsulated;
a light source configured to receive a bias and emit light including a resonance light pair for causing the metal atoms to resonate;
a storage that is configured to store a reference value of the bias;
a light source temperature adjustor configured to adjust temperature of the light source;
a bias detector configured to detect information with respect to the bias; and
a light-source-temperature-adjustor controller configured to control the light source temperature adjustor based on the information detected by the bias detector,
wherein the light-source-temperature-adjustor controller is configured to control the light source temperature adjustor based on a comparison result of the information detected by the bias detector and the reference value.
2. The quantum interference device according to claim 1 , wherein the light source includes a surface emitting laser.
3. The quantum interference device according to claim 1 , wherein the information detected by the bias detector includes a voltage value of the bias.
4. The quantum interference device according to claim 1 , wherein the information detected by the bias detector includes a current value of the bias.
5. The quantum interference device according to claim 1 , further comprising a bias controller configured to control the bias to adjust a wavelength of the light emitted from the light source to a predetermined value.
6. The quantum interference device according to claim 5 , wherein the light-source-temperature-adjustor controller is configured to cause the light source temperature adjustor adjust a temperature of the light source to a predetermined temperature, and
the light-source-temperature-adjustor controller is configured to adjust the predetermined temperature at a time interval longer than a control time interval of the bias controller based on the information detected by the bias detector.
7. The quantum interference device according to claim 6 , wherein the time interval is within a range of 1000 seconds and 1000000 seconds.
8. An atomic oscillator comprising:
the quantum interference device according to claim 1 ; and
a light receiver that is configured to receive light which is output from the atom cell.
9. An atomic oscillator comprising:
the quantum interference device according to claim 2 ; and
a light receiver that is configured to receive light which is output from the atom cell.
10. An atomic oscillator comprising:
the quantum interference device according to claim 3 ; and
a light receiver that is configured to receive light which is output from the atom cell.
11. An electronic apparatus comprising:
the quantum interference device according to claim 1 ; and
a receiver that is configured to receive information via antenna,
wherein the quantum interference device is located in the receiver.
12. An electronic apparatus comprising:
the quantum interference device according to claim 2 ; and
a receiver that is configured to receive information via antenna,
wherein the quantum interference device is located in the receiver.
13. An electronic apparatus comprising:
the quantum interference device according to claim 3 ; and
a receiver that is configured to receive information via antenna,
wherein the quantum interference device is located in the receiver.
14. A moving object comprising:
the quantum interference device according to claim 1 ; and
a movable body that houses the quantum interference device.
15. A moving object comprising:
the quantum interference device according to claim 2 ; and
a movable body that houses the quantum interference device.
16. The quantum interference device according to claim 1 , further comprising:
a light receiver that is configured to detect intensity of the light transmitted through the atomic cell; and
a bias controller configured to control the bias based on the intensity of the light detected by the light receiver.
17. The quantum interference device according to claim 16 ,
wherein the bias from the bias controller is input to the light source and the bias detector.