High-accuracy Capabilities of an OsO<sub>4</sub>Molecular-beam Frequency Standard

Godone, A.; Sassi, Maria Paola; Bava, E.

doi:10.1088/0026-1394/26/1/002

Cited by 14 publications

(1 citation statement)

References 27 publications

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“…In terms of two-level AOCs, atomic beam type is applicable to any two-level atomic system with metastable upper state. There are abundant quantum systems available, atomic beams such as Mg [65], Ca [66], Sr [67], Ba, and molecular beams such as CH 4 [68] and OsO 4 [69]. The basic working principle of atomic beam type AOC is as follows: gaseous atoms generated by a heating oven are collimated to form an atomic beam.…”

Section: Atomic Beam Two-level Aocmentioning

confidence: 99%

The development of active optical clock

et al. 2023

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The atomic clocks, whether operating at optical or microwave region, can be divided into two categories according to their working mode, namely the passive clocks and active clocks. The passive clocks, whose standard frequency is locked to an ultra-narrow atomic spectral line, such as laser cooled Cs beam or lattice trapped Sr atoms, depend on the spontaneous emission line. On the contrary, the active clocks, in which the atoms are used as the gain medium, are based on the stimulated emission radiation, their spectrum can be directly used as the frequency standard. Up to now, the active hydrogen maser has been the most stable microwave atomic clocks. Also, the Sr superradiant active atomic clock is prospects for a millihertz-linewidth laser. Moreover, the optical clocks are expected to surpass the performance of microwave clocks both in stability and uncertainty, since their higher working frequency. The active optical clock has the potential to improve the stability of the best clocks by 2 orders of magnitude. In this work, we introduce the development of active optical clocks, and their types is classified according to the energy-level structure of atoms for stimulated radiation.

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