Atomic clocks and related methods

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.

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.