A sensor system (10, 200, 300), comprising: a laser source (12, 210, 214, 310) configured to emit a pump beam at a first wavelength and a probe beam at a second wavelength; optical means (20, 220, 222, 320, 400) for receiving the pump beam and the probe beam from the laser source, the optical means operative to generate a plurality of light beams, each having a different frequency, from the pump beam and the probe beam, wherein the optical means comprises: a photonic integrated circuit configured to receive the pump beam and the probe beam, the photonic integrated circuit including an array of cascaded frequency shifters operative to generate substantially parallel light beams, each having a different frequency, from the pump beam, and substantially parallel light beams from the probe beam; a first and/or second optical device (30, 224, 228, 324, 424) configured to receive the substantially parallel light beams from the photonic integrated circuit, and to broaden the light beams into respective light sheets; a vapor cell (40, 230, 330) configured to receive the light sheets from the first and/ or second optical device and to allow passage of the light sheets therethrough, the vapor cell containing a plurality of alkali atoms that are excitable to a manifold of Rydberg energy levels by the light beams; one or more electric field plates (232, 332) coupled to the vapor cell configured to produce an electric field gradient; a dichroic filter configured to receive the light sheets from the vapor cell, the dichroic filter operative to separate pump beam light and probe beam light such that only the probe light sheets pass to a detector array; and a detector array configured to receive the probe beam light from the dichroic filter, the detector array including a two-dimensional array of photosensors operative to map out transmission of light sheets along two axes from the vapor cell. a laser source (12, 210, 214, 310) configured to emit a pump beam at a first wavelength and a probe beam at a second wavelength; optical means (20, 220, 222, 320, 400) for receiving the pump beam and the probe beam from the laser source, the optical means operative to generate a plurality of light beams, each having a different frequency, from the pump beam and the probe beam, wherein the optical means comprises: a photonic integrated circuit configured to receive the pump beam and the probe beam, the photonic integrated circuit including an array of cascaded frequency shifters operative to generate substantially parallel light beams, each having a different frequency, from the pump beam, and substantially parallel light beams from the probe beam; a first and/or second optical device (30, 224, 228, 324, 424) configured to receive the substantially parallel light beams from the photonic integrated circuit, and to broaden the light beams into respective light sheets; a photonic integrated circuit configured to receive the pump beam and the probe beam, the photonic integrated circuit including an array of cascaded frequency shifters operative to generate substantially parallel light beams, each having a different frequency, from the pump beam, and substantially parallel light beams from the probe beam; a first and/or second optical device (30, 224, 228, 324, 424) configured to receive the substantially parallel light beams from the photonic integrated circuit, and to broaden the light beams into respective light sheets; a vapor cell (40, 230, 330) configured to receive the light sheets from the first and/ or second optical device and to allow passage of the light sheets therethrough, the vapor cell containing a plurality of alkali atoms that are excitable to a manifold of Rydberg energy levels by the light beams; one or more electric field plates (232, 332) coupled to the vapor cell configured to produce an electric field gradient; a dichroic filter configured to receive the light sheets from the vapor cell, the dichroic filter operative to separate pump beam light and probe beam light such that only the probe light sheets pass to a detector array; and a detector array configured to receive the probe beam light from the dichroic filter, the detector array including a two-dimensional array of photosensors operative to map out transmission of light sheets along two axes from the vapor cell.