Atomic clocks and related methods

Patent metadata

Field	Value
Publication number	US-11960247-B2
Application number	US-202318197473-A
Country	US
Kind code	B2
Filing date	May 15, 2023
Priority date	Jul 2, 2020
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

According to some aspects of the present disclosure, an atomic clock and methods of forming and/or using an atomic clock are disclosed. In one embodiment, an atomic clock includes: a light source configured to illuminate a resonance vapor cell; a narrowband optical filter disposed between the light source and the resonance vapor cell and arranged such that light emitted from the light source passes through the narrowband optical filter and illuminates the resonance vapor cell. The resonance vapor cell is configured to emit a signal corresponding to a hyperfine transition frequency in response to illumination from the light source, and a filter cell is disposed between the light source and the resonance vapor cell and configured to generate optical pumping. An optical detector is configured to detect the emitted signal corresponding to the hyperfine transition frequency.

First claim

What is claimed is:

1. An atomic clock comprising:
a light source configured to illuminate a resonance vapor cell;
a narrowband optical filter disposed between the light source and the resonance vapor cell and arranged such that light emitted from the light source passes through the narrowband optical filter and illuminates the resonance vapor cell, wherein the resonance vapor cell is configured to emit a signal corresponding to a hyperfine transition frequency in response to illumination from the light source;
a filter cell comprised at least partially of Rubidium, the filter cell disposed between the light source and the resonance vapor cell and configured to generate optical pumping; and
wherein the narrowband optical filter is disposed on a surface of the filter cell;
an optical detector configured to detect the emitted signal corresponding to the hyperfine transition frequency;
wherein the atomic clock is configured to apply a C field as a magnetic field to produce narrow magnetic resonance linewidth and produce clock stability through low drift clock signal.

2. The atomic clock of claim 1 , wherein the light source comprises a light emitting diode configured to illuminate the resonance vapor cell.

3. The atomic clock of claim 1 , wherein the light source comprises a quantum dot laser configured to illuminate the resonance vapor cell.

4. The atomic clock of claim 1 , wherein the resonance vapor cell is comprised at least partially of Rubidium or Cesium.

5. The atomic clock of claim 1 , wherein the atomic clock is configured as a chip-scale atomic clock.

6. An atomic clock comprising:
a light emitting diode or quantum dot laser, configured to illuminate a resonance vapor cell;
a narrowband optical filter disposed on a surface of a filter cell disposed between the light emitting diode or quantum dot laser and the resonance vapor cell and arranged such that light emitted from the light emitting diode or quantum dot laser passes through the narrowband optical filter and illuminates the resonance vapor cell, wherein the resonance vapor cell is configured to emit a signal corresponding to a hyperfine transition frequency in response to illumination from the light emitting diode or quantum dot laser and wherein the filter cell is comprised at least partially of Rubidium;
and
an optical detector configured to detect the emitted signal corresponding to the hyperfine transition frequency,
wherein the atomic clock is configured to apply a C field as a magnetic field to produce narrow magnetic resonance linewidth and produce clock stability through low drift clock signal.

7. The atomic clock of claim 6 , wherein the resonance vapor cell is comprised at least partially of Rubidium or Cesium.

8. The atomic clock of claim 6 , wherein the atomic clock is configured as a chip-scale atomic clock.

9. The atomic clock of claim 6 , wherein the optical detector comprises a photodiode.

10. A method relating to an atomic clock, comprising:
illuminating, by a light emitting diode or quantum dot laser, a resonance vapor cell, wherein the resonance vapor cell is configured to emit a signal corresponding to a hyperfine transition frequency in response to illumination from the light emitting diode or quantum dot laser;
generating optical pumping by a filter cell disposed between the light emitting diode or quantum dot laser and the resonance vapor cell
filtering, by a narrowband optical filter, light emitted from the light emitting diode or quantum dot laser such that the emitted light passes through the narrowband optical filter and illuminates the resonance vapor cell;
detecting, by an optical detector, the emitted signal corresponding to the hyperfine transition frequency;
providing a magnetic shield that encompasses at least the light emitting diode or quantum dot laser, resonance vapor cell, narrowband optical filter, and optical detector, and wherein the magnetic shield is configured to minimize a magnetic field causing broadening or shifting of energy levels; and
applying a C field as a magnetic field to produce narrow magnetic resonance linewidth and produce clock stability through low drift clock signal.

11. The method of claim 10 , wherein the filter cell is comprised at least partially of Rubidium.

12. The method of claim 10 , wherein the resonance vapor cell is comprised at least partially of Rubidium.

13. The method of claim 10 , wherein the resonance vapor cell is comprised at least partially of Cesium.

14. The method of claim 10 , wherein the optical detector comprises a photodiode.

Assignees

• Univ Colorado Regents
• Univ Colorado Regents

Inventors

• Knappe Svenja
• Krzyzewski Sean

Classifications

• G04F5/14 Primary

  using atomic clocks · CPC title

• G04F5/04

  using oscillators with electromechanical resonators {producing electric oscillations or timing pulses} · CPC title

• G04F5/145 Primary

  using Coherent Population Trapping · CPC title

• G02B5/20

  Filters (polarising elements G02B5/30) · CPC title

• G02B5/202

  comprising a gas or vapour · CPC title