Integrated Photonics Mode Splitter for Satellite Clock Sync
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Solution Overview
Problem
Existing systems for synchronizing atomic clocks on satellites are limited by size, weight, and power constraints, and lack the precision and security needed for accurate time distribution across distances, particularly in smaller satellite platforms.
Innovation Solution
A chip-scale integrated photonics system that generates and interferes time-entangled photons using a hybrid optical waveguide platform, combining nonlinear properties of periodically poled potassium titanyl phosphate (ppKTP) and silicon nitride waveguides, enabling precise and secure synchronization of optical atomic clocks with reduced size, weight, and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional synchronization hardware is used, then time distribution accuracy is achieved, but size and weight increase
Solution Approach 1:
The patent replaces traditional mechanical/electronic synchronization hardware with an integrated photonic system that uses optical waves and quantum entanglement for time distribution. This substitution of physical mechanisms enables high-precision time synchronization while dramatically reducing the size and weight of the synchronization hardware, making it suitable for smaller satellite platforms.
Solution Approach 2:
The patent transitions from traditional three-dimensional bulky hardware to a two-dimensional integrated photonic circuit platform. By confining optical modes in planar waveguides and using surface-mounted components, the system achieves high precision time distribution in a thin, lightweight form factor that can be deployed on resource-constrained satellite platforms.
2Measurement precision
If traditional synchronization hardware is used, then time distribution accuracy is achieved, but power consumption increases
Solution Approach 1:
The patent replaces power-intensive traditional electronic synchronization systems with a photonic system that uses optical carriers and quantum effects. This substitution eliminates the need for high-power electronic components while maintaining time distribution accuracy, significantly reducing the power budget required for satellite clock synchronization.
Solution Approach 2:
The patent changes the fundamental operating parameters from electrical domain to optical domain, utilizing properties such as optical frequency, phase, and quantum entanglement. This parameter transformation enables precise time measurement without the power consumption associated with traditional electronic oscillators and signal processing circuits.
3Weight of moving object
If integrated photonic system is used, then size and power are reduced, but device complexity increases
Solution Approach 1:
The patent merges multiple discrete photonic components (waveguides, beam splitters, phase shifters, detectors) into a single integrated photonic circuit. This integration consolidates complex functionality into a unified device that can be fabricated using standard semiconductor manufacturing processes, reducing assembly complexity while maintaining the sophisticated functions needed for quantum time synchronization.
Solution Approach 2:
The integrated photonic circuit is designed to perform multiple functions within a single device structure, including photon generation, mode conversion, beam splitting, phase modulation, and detection. This multi-functionality reduces the number of separate components needed, simplifying the overall system architecture despite the advanced capabilities required for high-precision time distribution.
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
The system achieves high precision time synchronization with reduced size, weight, and power consumption, enabling improved signal intelligence and increased sensitivity to weak signals, and is deployable on smaller satellite platforms.
Implementation Method 1
one or more mode splitters that receive at least one of a first photon in a first mode and a second photon in a second mode through an input port and provide at least one of the first photon through a first output port and the second photon through a second output port
Implementation Method 2
a mode converter coupled to the second output of a mode splitter in the one or more mode splitters, wherein the mode converter receives the second photon through a port and outputs the second photon in the first mode through the port
Implementation Method 3
a waveguide layer on the substrate, wherein the waveguide has a second index of refraction different from the first index of refraction
Data Source
Figure 1
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Figure 3A~3C
AI summary
Systems and embodiments for an integrated photonics mode splitter (600) and converter (700) are provided herein. In certain embodiments, a system includes a substrate having a first index of refraction. Additionally, the system includes a waveguide layer on the substrate, wherein the waveguide has a second index of refraction different from the first index of refraction. Also, the waveguide layer includes one or more mode splitters (600) that receive at least one of a first photon in a first mode and a second photon in a second mode through an input port (603) and provide one of the first photon through a first output port (607) and the second photon through a second output port (613). The waveguide layer also includes a mode converter (700) coupled to the second output of a mode splitter (613), wherein the mode converter (700) receives the second photon (701) through a port (703) and outputs the second photon (707) in the first mode through the port (703).