Method and system for operating a laser self-modulated at...

Details Method and system for operating a laser self-modulated at... Method and system for operating a laser self-modulated at...

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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Vanier, J., et al., “Contrast and Linewidth of the Coherent Population Trapping Transmission Hyperfine Resonance Line in 87Rb: Effect of Optical Pumping”, Physical Review A, vol. 67, pp. 065801-1-0865801-4, (2003).
Nikonov, D.E., et al., “Atomic Coherence Effects Within the Sodium D1, Manifold: II. Coherent Optical Pumping”, Quantum Opt., vol. 6, pp. 245-260, (1994).
Bell, W.E., et al., “Optical Detection of Magnetic Resonance in Alkali Metal Vapor”, Physical Review, vol. 107, No. 6, pp. 1559-1566, (1957).
Bell, W.E., et al., “Optically Driven Spin Precession”, Physical Review Letters, vol. 6, No. 6, pp. 280-281, (1961) .

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