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PULSED INTERROGATION IN AN ATOMIC CLOCK BASED ON COHERENT POPULATION TRAPPING |
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N. DIMARCQ
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TECHNICAL DESCRIPTION
This invention describes a process to generate an atomic clock signal and the corresponding atomic clock.
The description concerns :
- On the one hand, the pulsed interrogation in a clock based on coherent population trapping. The amplitude of the optical signal is not constant, but is periodically modulated. The signal measured at the pulse (n) is depending of the atomic state created at the pulse (n-1) and of its evolution during the time between both pulses.
- On the other hand, the clock signal generation. It is based on the difference between the measured signals during the different pulses, which allows to increase the clock signal contrast, while rejecting the slow fluctuations of the lasers parameters used for the interrogation.
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