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Poster Session

Poster Session III

4:00 pm – 6:00 pm, Thursday June 19 Session S00 Oregon Convention Center:, Exhibit Hall E
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Harmonic and Intermodulation Distortion in Atomic Quantum Receivers

Poster 82
Presenter: Luis Felipe Goncalves (Rydberg Technologies Inc)
Authors: Teng Zhang (Rydberg Technologies Inc), Georg Raithel (Rydberg Technologies Inc), David Anderson (Rydberg Technologies Inc)

We report here on the measurement and characterization of non-linear behavior and spurious response of a Rydberg atomic heterodyne receiver. Single-tone and two-tone testing procedures are developed and implemented for measurement of harmonic and inter-modulation distortion in Rydberg atomic receivers based on multi-photon Rydberg spectroscopy and radio-frequency heterodyne signal detection in an atomic vapor. For a predetermined set of atomic receiver parameters and RF carrier waves in the SHF band near-resonant to a cesium Rydberg transition, we measure and characterize atomic receiver selectivity, bandwidth, roll-off, compression point (P1dB), second order (IP2) and third order (IP3) intercepts, and spur-free dynamic range. Receiver intermodulation distortion is characterized for the case of an interfering signal wave applied at two frequency offsets relative to the near-resonant reference local oscillator, ∆F/F = 10−4 at 6 dB and 10−6 at 22 dB single-tone bandwidths, respectively. We observe that under suitable operating conditions the atomic receiver can exhibit a suppression of harmonic and inter-modulation distortion relative to that of classical receiver mixer amplifiers.  Ref. https://arxiv.org/abs/2412.16366

Funding acknowledgement

This work was supported by Rydberg Technologies Inc. and, in part, by the Defense Advanced Research Projects Agency (DARPA) SAVaNT Program under agreement No. HR00112190065. Distribution Statement "A" (Approved for Public Release, Distribution Unlimited). The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the U.S. Government.

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