Publication

Laser-pumped double-resonance atomic clock using a micro-fabricated Rb cell

Nico de Rooij
2011
Conference Papers

Abstract

We present first results on a laser-pumped, double resonance (DR) Rubidium atomic clock, based on microfabricated Rb vapour cells. The study aims towards a miniature atomic clock [1] based on DR, using a lowpower laser as pump light source and a miniaturized microwave coupling structure (that will replace the bulky microwave cavity employed in today’s much bigger Rb clocks). Good signal amplitude, low background light level, and no need for GHz laser modulation are among the advantages of this approach.

Official source

https://infoscience.epfl.ch/entities/publication/8a34fc1a-bba7-4246-b7a5-6647b366a3bd

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Nico de Rooij
2011
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/8a34fc1a-bba7-4246-b7a5-6647b366a3bd

About this result

Related concepts (32)

Atomic clock

An atomic clock is a clock that measures time by monitoring the resonant frequency of atoms. It is based on atoms having different energy levels. Electron states in an atom are associated with different energy levels, and in transitions between such states they interact with a very specific frequency of electromagnetic radiation. This phenomenon serves as the basis for the International System of Units' (SI) definition of a second:The second, symbol s, is the SI unit of time.

Laser pumping

Laser pumping is the act of energy transfer from an external source into the gain medium of a laser. The energy is absorbed in the medium, producing excited states in its atoms. When the number of particles in one excited state exceeds the number of particles in the ground state or a less-excited state, population inversion is achieved. In this condition, the mechanism of stimulated emission can take place and the medium can act as a laser or an optical amplifier. The pump power must be higher than the lasing threshold of the laser.

Laser

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word laser is an anacronym that originated as an acronym for light amplification by stimulated emission of radiation. The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories, based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light that is coherent.

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Laser-pumped double-resonance atomic clock using a micro-fabricated Rb cell

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