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RaEl

On optimizing the parameters of the static automatic frequency control system of a passive quantum frequency standard in terms of the accuracy characteristics

V. S. Zholnerov, V. V. Kornienko

Published Jan 1, 1976• 0 citations
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The necessity of developing a new design for automatic control of the optical signal gain to ensure the stability of the output parameters of the atomic frequency standard (AFS) based on rubidium-87 atoms under various external conditions of its operation is substantiated. This is especially true during the operation of this AFS as part of mobile objects for various purposes. A new scheme for automatic gain control in the optical path of an AFS based on rubidium-87 atoms is presented. The amplifier of the error signal formed on the photodetector for controlling the microwave signal is considered in detail. An experiment was carried out, and its final metrological characteristics were presented for the atomic frequency standard based on rubidium atoms - 87 with automatic gain control. The validity of the developed automatic amplification scheme for the new frequency standard based on rubidium atoms-87 is confirmed.
The paper describes the practical realization and characteristics of a small, totally autonomous, passive frequency standard based on the coherent population trapping (CPT) phenomenon. A description of the frequency standard, including physical characteristics, block diagrams of the optical control CPT resonance system and of the digital control electronics is given. The characteristics of the frequency standard relative to general functionality and frequency stability are given, as measured on several units.