All-optical rf simultaneous i/q phase readout in a quantum antenna
AssigneesSRI International, Government of the United States of America, AS Represented By the Secretary of Commerce
InventorsSamuel Berweger, Christopher L Holloway, Alexandra Brae Artusio-Glimpse, Andrew Peter Rotunno, Nikunjkumar Prajapati, Matthew Simons, Kaitlin Moore, Joseph Christesen
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Abstract
A method includes detecting, by an atomic receiver, incident electromagnetic (EM) radiation comprising an incident EM frequency and an incident EM phase, and generating, by the atomic receiver and based on the detected incident EM radiation, a signal indicative of the incident EM phase, wherein the atomic receiver generates the signal without the use of a local oscillator.
Claims22
A method comprising:
- detecting, by an atomic receiver, incident electromagnetic (EM) radiation comprising an incident EM frequency and an incident EM phase;
- and
- generating, by the atomic receiver and based on the detected incident EM radiation, a signal indicative of the incident EM phase, wherein the atomic receiver generates the signal without the use of a local oscillator.
A sensing system comprising an atomic receiver configured to detect an incident EM phase of incident electromagnetic (EM) radiation without the use of a local oscillator.
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A sensing system, comprising:
- a vapor cell including a plurality of alkali atoms;
- a preparation system configured to direct optical electromagnetic (EM) radiation of a plurality of optical frequencies into the vapor cell and incident on the plurality of alkali atoms, the preparation system comprising:
- a probe electromagnetic (EM) radiation having a probe frequency;
- a first coupling EM radiation having a first coupling frequency and a first coupling phase;
- and
- a second coupling EM radiation having a second coupling frequency and a second coupling phase,
- wherein each of the probe frequency, the first coupling frequency, and the second coupling frequency comprises at least one of an ultraviolet (UV), a visible, or a near-infrared (NIR) frequency, and
- wherein the EM radiation of the plurality of optical frequencies is configured to excite the plurality of alkali atoms from a first quantum state to a plurality of Rydberg states comprising a quantum interferometric loop;
- and
- a detector configured to detect an electrically induced transparency (EIT) of the plurality of alkali atoms upon excitation of the alkali atoms by incident EM radiation comprising an incident EM frequency and an incident EM phase, wherein the EIT is indicative of the incident EM phase.
Dependencies are inferred from the claim text.