Oscillators – Automatic frequency stabilization using a phase or frequency... – Molecular resonance stabilization
Reexamination Certificate
2008-01-29
2008-01-29
Mis, David (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Molecular resonance stabilization
C331S094100
Reexamination Certificate
active
07323941
ABSTRACT:
The present invention provides a method and apparatus for making atomic clocks or atomic magnetometers as self-modulated laser systems based on the physics of push-pull optical pumping. An atomic vapor cell is required to be in the laser cavity. With proper conditions, spontaneous push-pull optical pumping can occur inside the laser cavity. This causes the laser beam to be modulated at hyperfine-resonance frequency. With a fast photodetector, the modulated laser signal can be converted into the electrical signal, which serves as the atomic clock ticking signal or magnetometer signal. The self-modulated laser system does not use any local oscillator and the microwave circuit to lock the oscillator frequency to the hyperfine-resonance frequency, and therefore can consume less power and become more compact than conventional systems. This invention will benefit applications of time measurements and magnetic-field measurements.
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Happer William
Jau Yuan-Yu
Mathews, Shepherd, McKay & Bruneau, P.A.
Mis David
Princeton University
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