Ramsey-bordé ion frequency-reference apparatus, and methods of making and using the same

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United States of America Patent

PATENT NO 11869679
APP PUB NO 20230076629A1
SERIAL NO

17576897

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Abstract

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In some variations, an interferometric frequency-reference apparatus comprises: an atom source configured to supply neutral atoms to be ionized; an ionizer configured to excite the neutral atoms to form ionized atoms; an ion collimator configured to form a collimated beam of the ionized atoms; probe lasers; and a Doppler laser configured to determine a ground-state population of the ionized atoms, wherein the atom source, the ionizer, and the ion collimator are disposed within a vacuum chamber. Other variations provide a method of creating a stable frequency reference, comprising: forming ionized atoms from an atomic vapor; forming a collimated beam of ionized atoms; illuminating ionized atoms with first and second probe lasers; adjusting the frequencies of the first probe and second probe lasers using Ramsey spectroscopy to an S→D transition of ionized atoms; and determining a ground-state population of the ionized atoms with another laser.

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Patent Owner(s)

Patent OwnerAddress
HRL LABORATORIES LLC3011 MALIBU CANYON ROAD MALIBU CA 90265-4799

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Autry, Travis Calabasas, US 3 0
Counts, Ian Santa Monica, US 2 0
Ellis, Jennifer Calabasas, US 4 4
Kim, Danny Agoura Hills, US 21 562
Roper, Christopher Oak Park, US 15 75

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