Rohde and Schwarz Gmbh & Co. Kg

University of Basel

Yongqi Shi

Thomas Ruster

Melvyn Ho

Philipp Treutlein

The present disclosure relates to a sensor system for analyzing a spectrum of an electromagnetic, EM, signal. The system includes a vapor cell containing at least one species of atoms in a gaseous form, wherein the atoms in the vapor cell are exposed to the EM signal; at least one excitation source excites a number of atoms in the vapor cell to a Rydberg state, wherein at least a fraction of the excited atoms are ionized; a number of electrode pairs which are arranged along the vapor cell, and which generate a spatially and/or temporally varying electric field in the vapor cell; a current sense circuit detects a current between at least one of the number of electrode pairs, wherein the current is caused by ionized atoms in the vapor cell; and a processor determines spectral information of the EM signal based on the detected current.

Sensor system and method for analyzing a spectrum of an EM signal

A sensor system for sensing EM radiation and a method for calibrating the system are provided. The system includes a sensing element that receives calibration signals or signal components with different frequencies. Recording device records responses of the sensing element to at least two calibration signals or signal components. A respective response to a calibration signal of the at least two calibration signals or signal components depends on an excitation of one or more of the resonances by the calibration signal. A part of the recorded responses to and/or information derived from at least a part of the recorded responses is stored in a model which correlates the responses to frequencies and/or signal levels of the corresponding calibration signals or signal components. Processor uses the model to convert a response of the sensing element to an EM signal to be analyzed into a frequency spectrum of the EM signal.

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Basel, Switzerland

Yongqi Shi