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Dataset presenting improved bandwidth in Rydberg atom electrometry with an optical frequency comb probe

Published by National Institute of Standards and Technology | National Institute of Standards and Technology | Metadata Last Checked: August 02, 2025 | Last Modified: 2024-02-01 00:00:00
Rydberg atom-based receivers of modulated radio frequency (RF) fields are promising systems for measurements. These systems are self-calibrating, widely tunable, nearly transparent to RF fields, and can be electrically small. However, the instantaneous bandwidth of current Rydberg atom receivers is typically less than 1 MHz. Using two-photon electromagnetically induced transparency (EIT) to observe the 56D5/2 Rydberg state in cesium, we measure modulation sidebands on each tooth in a probe optical frequency comb that spans the D2 F=4-F'=5 transition resulting from transmission modulation of the probe beam. This transmission modulation occurs from changes in susceptibility of the room temperature cesium vapor as two RF fields impinge on the atoms. A strong RF local oscillator is resonant with the 56D-57P state and mixes with a weak RF signal field detuned from the RF LO by an intermediate frequency. Using a self-heterodyned electro-optic comb setup, we separate positive and negative sideband amplitudes and compare to an equivalent comb-free system. These data report EIT measurement with the comb system, local spectra around two comb teeth - one within and one outside the EIT line, and normalized minimum detectable RF signal field as a function of RF intermediate frequency used to evaluate the instantaneous bandwidth of the single frequency, positive sideband, and negative sideband datasets.

Resources

4 resources available

  • Local spectrum around two comb teeth with 50 kHz RF modulation signal

    THREE COLUMN DATA: DETUNING (MHZ), WITHIN EIT POWER SPECTRUM (V/RT(HZ)), OUTSIDE EIT POWER SPECTRUM (V/RT(HZ))
  • EIT Spectrum

    TWO COLUMN DATA: DETUNING (I.E. RELATIVE COMB TOOTH FREQUENCY) IN MHZ, PROBE COMB TOOTH TRANSMISSION IN ARBITRARY UNITS
  • Minimum detectable field dependence with intermediate frequency - Bandwidth study

    21 COLUMN DATA: MEASURED DATA WITH 95 % ERROR BARS GIVEN IN FIRST 10 COLUMNS (INCLUDING THREE MEASUREMENT TYPES), EXPONENTIAL FITS WITH 95% CONFIDENCE BOUNDS GIVEN IN NEXT 10 COLUMNS, AND 3 DB POINT USED TO DEFINE BANDWIDTH OF EACH MEASUREMENT GIVEN IN THE LAST COLUMN
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