{
    "identifier": "ark:\/88434\/mds2-3159",
    "accessLevel": "public",
    "contactPoint": {
        "hasEmail": "mailto:[email protected]",
        "fn": "Aly Artusio-Glimpse"
    },
    "programCode": [
        "006:045"
    ],
    "landingPage": "https:\/\/data.nist.gov\/od\/id\/mds2-3159",
    "title": "Dataset presenting improved bandwidth in Rydberg atom electrometry with an optical frequency comb probe",
    "description": "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.",
    "language": [
        "en"
    ],
    "distribution": [
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-3159\/Fig1e_combToothSpectrum_oneTone_combined.csv",
            "format": "Three column data: Detuning (MHz), Within EIT Power Spectrum (V\/rt(Hz)), Outside EIT Power Spectrum (V\/rt(Hz))",
            "description": "Probe frequency comb excites D2 F=4-F'=5 transition in cesium, counter propagating coupling laser resonant with 6P3\/2-56D5\/2 excites to Rydberg state, and two RF fields impinge the atoms - a strong LO resonant with the 56D5\/2-57P3\/2 transition and a weak signal 50 kHz detuned from the LO. These data give the local FFT spectra around two comb teeth - one exactly at the center of the EIT line and one 10 MHz above the EIT line. The spectrum around the tooth within the EIT line includes sidebands at +\/- 50 kHz, while the spectrum around the tooth outside the EIT line does not. The peaks at +\/- 20 kHz are from laser stabilization and are not related to any atomic interaction.",
            "mediaType": "text\/csv",
            "title": "Local spectrum around two comb teeth with 50 kHz RF modulation signal"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-3159\/Fig1d_EITspectrumRecordedByCombs.csv",
            "format": "Two column data: Detuning (i.e. relative comb tooth frequency) in MHz, Probe comb tooth transmission in arbitrary units",
            "description": "Probe frequency comb spans the D2 F=4-F'=5 transition in cesium and counter-propagating coupling laser is resonant with the 6P3\/2-56D5\/2 transition. No RF fields impinge on the atoms in this dataset. The combined effect of the probe and coupling lasers is a narrow transmission window in the probe comb spectrum called electromagnetically induced transparency (EIT). This data gives the transmitted power (in arbitrary normalized units) of each probe comb tooth showing the EIT window having a full width at half max of 3.1 MHz.",
            "mediaType": "text\/csv",
            "title": "EIT Spectrum"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-3159\/3159_README.txt",
            "mediaType": "text\/plain",
            "title": "Read me file"
        },
        {
            "downloadURL": "https:\/\/data.nist.gov\/od\/ds\/mds2-3159\/Fig2_NormMinDetectableSigVSIF.csv",
            "format": "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",
            "description": "Probe frequency comb spans the D2 F=4-F'=5 transition in cesium, counter-propagating coupling laser is resonant with the 6P3\/2-56D5\/2 transition, and two RF fields impinge on the atoms. A strong RF LO is resonant with the 56D5\/2-57P3\/2 transition and a weak RF signal is detuning from the LO by an intermediate frequency from kilohertz to megahertz. Sidebands are imparted to each of the probe comb teeth following propagation through the cesium atoms in vapor. These sidebands occur at the intermediate frequency between the RF fields. The positive and negative sidebands are extracted and Gaussian fits across each comb spectrum applied to determine the amplitude of each sideband (nominally equal to the sideband value at the comb tooth located exactly at the center of the EIT). The strength of the RF field is ramped down and the field strength at the point where the sideband amplitudes equal the noise floor in the measurement is recorded. Similarly, the frequency comb on the probe laser is turned off, leaving a single frequency laser that is resonant with the D2 F=4-F'=5 transition and the minimum detectable RF signal field is determined based on the signal at the intermediate frequency using a spectrum analyzer. The minimum detectable field values for each data set - single frequency, positive sideband, and negative sideband - as a function of the set of intermediate frequencies measured are then fitted to an exponential function. These data report the measured minimum detectable field normalized by the fitted value at low intermediate frequency for each of the three datasets including normalized propagated 95 % confidence bounds in the minimum detectable field. Also included in these data is the normalized exponential fits to the measured minimum detectable field vs intermediate frequency with respective 95 % confidence bounds. Lastly, the 3 dB-point where each determined minimum detectable field strength at low intermediate frequency increases by a factor of two is given (simply a value of two in these normalized units).",
            "mediaType": "text\/csv",
            "title": "Minimum detectable field dependence with intermediate frequency - Bandwidth study"
        }
    ],
    "bureauCode": [
        "006:55"
    ],
    "modified": "2024-02-01 00:00:00",
    "publisher": {
        "@type": "org:Organization",
        "name": "National Institute of Standards and Technology"
    },
    "theme": [
        "Advanced Communications:Quantum communications",
        "Advanced Communications:Wireless (RF)",
        "Physics:Optical physics",
        "Physics:Atomic, molecular, and quantum"
    ],
    "keyword": [
        "Rydberg atoms",
        "atomic physics",
        "receivers",
        "fields strength",
        "electric field",
        "volts\/meter",
        "optical frequency combs",
        "electro-optics",
        "heterodyne",
        "modulation"
    ]
}