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This paper reports on progress on a compact clock based on Coherent Population Trapping (CPT) using caesium vapour cell. The clock is working in a pulsed regime with two orthogonal linear polarizations made by two phase-locked lasers tuned to 895 nm and separated by 9.2 GHz. The short-term frequency stability is mainly limited by the Local Oscillator (LO) noise contribution and the laser relative...
In this work we describe the main features of a Rb clock developed at INRIM and its preliminary industrialization approach made by Selex-ES. The clock operates at the Rb ground-state hyperfine frequency (6834 MHz) in pulsed regime; the pulsed optical pumping (POP) allows to make negligible the mutual interference between optical and microwave signals so that a frequency stability comparable to that...
Vapor cell atomic clocks are an interesting technology because they combine compactness, low power consumption and excellent relative frequency stability. Recently, due to better performing laser sources and innovative techniques to prepare and detect the atoms, several cell-based prototypes exhibiting unprecedented frequency stability have been developed. These techniques allow a reduction in the...
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