Optically pumped frequency standard with reduces AC stark shift

Details Optically pumped frequency standard with reduces AC stark shift Optically pumped frequency standard with reduces AC stark shift

2007-04-10

2007-04-10

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Molecular resonance stabilization

C331S094100, C327S039000, C327S032000, C324S301000

Reexamination Certificate

active

10968264

ABSTRACT:
An apparatus for generating a stabilized frequency signal is disclosed. The apparatus includes a quantum absorber having first, second, and third energy states. The quantum absorber is irradiated by a first radiation source that generates electromagnetic radiation having a frequency, νL, that induces transitions between the first and third energy states. The quantum absorber is also irradiated by a second radiation source that generates electromagnetic radiation having a frequency, νM, that induces transitions between the first and second energy states. A detector that generates a detector signal indicative of the level of radiation leaving the quantum absorber in a frequency range including νLis used by a number of servo loops. One of the servo loops determines the value of νLthat minimizes or maximizes the detector signal and a second servo loop determines an offset signal that reduces the dependence of νMon the intensity of the first radiation source.

REFERENCES:
patent: 6265945 (2001-07-01), Delaney et al.
patent: 6888780 (2005-05-01), Happer et al.
patent: 6993058 (2006-01-01), Zhu
patent: 2005/0207456 (2005-09-01), Berberian et al.

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