Rydberg Field Probes for QRR in airborne applications

The overall objective of this Phase I R&D effort is to research and evaluate an existing Rydberg Field Probe (RFP) to develop a design for a next generation RFP that is robust to environmental conditions experienced during sub-orbital flight and has high sensitivity in the S-band and K-band. Rydberg field probes designed for 2-photon spectroscopy schemes are designed to deliver both the probe and coupler beams to the sensing element and efficiently collect the probe laser signal. We will perform a series of important experimental investigations to inform the mechanical stability of the probe head and service cord. In the first portion of the effort, we will evaluate RF signal reception under vibration tests of an existing RFP design to benchmark the stability performance of state-of-the-art RFP [3] against conditions typical for airborne use. In addition, we will investigate the impact of temperature dependence and local oscillator (LO) field quality on sensitivity and quality of RF signal detection. The information learned during the testing portion of this program will be used to develop an updated design for a mechanically stable and vibration hardened RFP that can operate at varying temperatures with a high-quality LO field. The goal of this effort, including all phases, is to develop an atom-based RF sensing prototype for integration with JPL’s QRR initiative that includes real time atom-based RF signal detection in test flight demonstrations. The final objective of Phase I work is a final report with all analyses and research findings to advance the concept. A TRL level of 2/3 is expected at completion of the phase I effort.

This Phase 1 effort aims to advance JPL’s Quantum Rydberg Radar (QRR) effort. QRR based on Rydberg atom sensing is targeted to advance capabilities in remote sensing for Earth and space-based science missions in Surface Topography and Vegetation (STV) with a disruptive option for a small, low-cost architecture that can enable ultra-broad-band imaging to cover different observables and penetration depths that can be dynamically tuned to focus on certain bands of interest. The proposed Phase 1 effort is aimed at creating a design for a Rydberg Field Probe that is robust to mechanical and environmental variation. Rydberg Field Probes are a critical subcomponent of Rydberg atomic sensing systems. Rydberg atom sensing has potential applications in RF markets including test and measurement, DoD, aerospace, and commercial communications, THz imaging, and semiconductor inspection.

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