NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Influence of modulation frequency in rubidium cell frequency standardsThe error signal which is used to control the frequency of the quartz crystal oscillator of a passive rubidium cell frequency standard is considered. The value of the slope of this signal, for an interrogation frequency close to the atomic transition frequency is calculated and measured for various phase (or frequency) modulation waveforms, and for several values of the modulation frequency. A theoretical analysis is made using a model which applies to a system in which the optical pumping rate, the relaxation rates and the RF field are homogeneous. Results are given for sine-wave phase modulation, square-wave frequency modulation and square-wave phase modulation. The influence of the modulation frequency on the slope of the error signal is specified. It is shown that the modulation frequency can be chosen as large as twice the non-saturated full-width at half-maximum without a drastic loss of the sensitivity to an offset of the interrogation frequency from center line, provided that the power saturation factor and the amplitude of modulation are properly adjusted.
Document ID
19830027084
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Audoin, C.
(Paris-Sud Univ. Orsay, France)
Viennet, J.
(Paris-Sud Univ. Orsay, France)
Cyr, N.
(Paris-Sud Univ. Orsay, France)
Vanier, J.
(Paris-Sud Univ. Orsay, France)
Date Acquired
August 11, 2013
Publication Date
February 1, 1983
Publication Information
Publication: NASA. Goddard Space Flight Center Proc. of the 14th Ann. Precise Time and Time Interval (PTTI) Appl. Planning Meeting
Subject Category
Electronics And Electrical Engineering
Accession Number
83N35355
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available