Rydberg Atom Network Node for Cost-Effective RF Sensing
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Solution Overview
Problem
Rydberg-atom based devices face high attenuation of optical signals at non-standard wavelengths when communicated over conventional optical fibers, necessitating expensive and unsafe remote optical signal generation and stabilization, making mass deployment costly and impractical.
Innovation Solution
A network node design that utilizes an optical fiber interface to receive and convert optical signals within standard fiber transmission bands, employing wavelength converters to excite Rydberg atoms to a predetermined state, and includes a photodetector to detect RF signals through electron transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If remote optical signal generation is used to supply optical signals to Rydberg-atom based devices, then the optical signals can be transmitted over conventional optical fibers, but high-power optical sources are required to compensate for attenuation, making the system expensive and unsafe
Solution Approach 1:
The patent changes the wavelength parameter of optical signals to match standard fiber transmission bands (O-band, E-band, S-band, C-band, L-band, U/XL-band) rather than using non-standard wavelengths. This parameter change enables signals to be transmitted over conventional optical fibers with standard sources, eliminating the need for high-power sources and reducing cost and safety risks.
2Ease of operation
If local optical signal sources are used in each Rydberg-atom based device, then optical signals can be generated without remote sources, but the devices require expensive and dedicated stabilization equipment for long-term operation
Solution Approach 1:
The patent introduces an intermediary approach where optical signals are generated remotely and transmitted through standard fibers to the Rydberg-atom based devices. This intermediary transmission system eliminates the need for each device to have its own expensive local source and stabilization equipment, while still providing stable signals for operation.
3Productivity
If mass deployment of Rydberg-atom based devices is pursued, then widespread adoption is achieved, but the high cost of local saturation absorption spectroscopy equipment makes deployment prohibitively expensive
Solution Approach 1:
The patent creates a universal solution where standard optical fibers and common wavelength bands can be used across all devices, eliminating the need for expensive device-specific stabilization equipment. This universal approach enables mass deployment by reducing the cost barrier for each individual device while maintaining operational stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and cost-effective distribution of stabilized optical signals to multiple Rydberg-atom based detectors using low-powered, safer sources, reducing the need for local stabilization equipment and enhancing network scalability.
Implementation Method 1
one or more wavelength converters configured to convert the wavelength of one or more of the first optical signal, second optical signal and third optical signal
Implementation Method 2
a Rydberg-atom based transmission medium configured to be excited by the first optical signal, second optical signal and third optical signal, following wavelength conversion of one or more of the first optical signal, second optical signal and third optical signal, such that electrons of the Rydberg-atom based transmission medium are excited to a predetermined Rydberg state
Implementation Method 3
a photodetector configured to detect an RF signal at the Rydberg-atom based transmission medium as a change in the first, second and/or third optical signal due to the electrons of the Rydberg-atom based transmission medium being excited by the RF signal from the predetermined Rydberg state to a further Rydberg state
Data Source
AI summary
This invention provides a network node comprising: an optical fibre interface configured to receive, from one or more remote optical sources, a first optical signal, a second optical signal and a third optical signal, wherein the first, second and third optical signals each have a respective wavelength within an optical fibre transmission band being one of the O-band, E-band, S-band, C-band, L-band, and U/XL-band; one or more wavelength converters configured to convert the wavelength of one or more of the first optical signal, second optical signal and third optical signal; and a Rydberg-atom based transmission medium configured to be excited by the first optical signal, second optical signal and third optical signal, following wavelength conversion of one or more of the first optical signal, second optical signal and third optical signal, such that electrons of the Rydberg-atom based transmission medium are excited to a predetermined Rydberg state.