Rubidium atom oscillator with temperature stabilized frequency o

Details Rubidium atom oscillator with temperature stabilized frequency o Rubidium atom oscillator with temperature stabilized frequency o

1996-03-19

1998-01-27

Grimm, Siegfried H.

Oscillators

Molecular or particle resonant type

331 3, 331176, H03L 102, H03L 726

Patent

active

057125970

ABSTRACT:
A rubidium atom oscillator has an increased allowable temperature range in which a frequency fluctuation due to change in the ambient temperature is suppressed. The frequency is stabilized in an increased temperature range as compared to the conventional rubidium atom oscillator. The rubidium atom oscillator oscillates a microwave having a predetermined stable frequency by using an optical pumping effect of rubidium gas. A rubidium lamp radiates a resonance light. A cavity resonator accommodates a gas cell containing rubidium gas and a photodetector detecting an amount of the resonance light passing through the gas cell. It is determined whether or not an ambient temperature of the cavity resonator is within a predetermined temperature range between a lower-limit temperature and an upper-limit temperature. A temperature correction signal is generated based on the determination. A current determined by the temperature correction signal is supplied to a coil surrounding the cavity resonator. The coil generates a magnetic field in the cavity resonator so as to change a resonance frequency of the cavity resonator.

REFERENCES:
patent: 3798565 (1974-03-01), Jechart
patent: 4456891 (1984-06-01), Fowks
patent: 4476445 (1984-10-01), Riley, Jr.

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