Oscillators – Molecular or particle resonant type
Reexamination Certificate
2008-03-18
2008-03-18
Pascal, Robert (Department: 2817)
Oscillators
Molecular or particle resonant type
C331S003000, C372S032000
Reexamination Certificate
active
10805005
ABSTRACT:
An apparatus and method for measuring CPT is disclosed. The apparatus includes a quantum absorber that is irradiated by radiation from an electromagnetic radiation source. The quantum absorber includes a material that exhibits CPT. The electromagnetic radiation source generates electromagnetic radiation having first and second CPT-generating frequency components. The first CPT-generating frequency component has a frequency νL−ν, and a first CPT component amplitude. The second CPT generating frequency component has a frequency νL+ν and a second CPT component amplitude. The apparatus also includes a detector for generating a detector signal related to the power of electromagnetic radiation that leaves the quantum absorber. The detector signal exhibits an asymmetry as a function of frequency ν in a frequency range about a frequency ν0. The apparatus includes an asymmetry servo loop that alters one of νL, the first CPT component amplitude, and the second CPT component amplitude to reduce the asymmetry.
REFERENCES:
patent: 6320472 (2001-11-01), Vanier
patent: 6363091 (2002-03-01), Zhu et al.
patent: 6993058 (2006-01-01), Zhu
patent: 7003438 (2006-02-01), Dowd et al.
patent: WO 01/26231 (2001-04-01), None
Levi, F. et al., :The Light Shift Effect in the Coherent Population Trapping Cessium Maser IEEE Transactions on Ultrasonics, vol. 47, No. 2, Mar. 2000, pp. 466-470.
Kuptsova, A. V., Influence of the Asymmetry of Optical Transitions in a Three-Level Atom on the CPT-Resonance Proceedings of the SPIE, vol. 5067, No. 1, 2003, pp. 209-217.
Zhu M. et al., “Narrow Linewidth CPT Signal in Small Vapor Cells for Chip Scale Atomic Clocks”, Freqency Control Symposium and Exposition 2004, pp. 100-103.
Berberian, J. et al., “Methods for Reducing Microwave Resonance Asymmetry in Coherent-Population-Trapping based Frequency Standards”, Frequency Symposium and Exposition, 2004, pp. 137-143.
Berberian John Edwin
Cutler Leonard S.
Zhu Miao
Agilent Technologie,s Inc.
Goodley James
Pascal Robert
LandOfFree
Method and apparatus for reducing errors due to line... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reducing errors due to line..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing errors due to line... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3950373