Ring Resonator Gyroscope for Chip-Integrated Quantum Rotation Sensing
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Solution Overview
Problem
Current optical gyroscopes are either too large for chip-integrated applications or lack sufficient sensitivity, leading to high costs and increased error-proneness due to the need for multiple laser sources and complex stabilization, making them unsuitable for universal applicability.
Innovation Solution
A compact sensor unit with a ring resonator design that utilizes a coupling-in waveguide, coupling-out units, and a detection unit, employing the Hong-Ou-Mandel effect for entanglement of photons, allowing precise and robust rotation measurements by pumping the ring resonator from two directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current optical gyroscopes are made large to ensure good sensitivity, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple laser sources and stabilization systems into a single integrated sensor unit with coupled waveguides. The first and second laser sources are integrated with their respective stabilization systems and coupled to the ring resonator through waveguides, eliminating the need for separate external components and reducing overall system complexity while maintaining high sensitivity measurements.
Solution Approach 2:
The patent implements a nested structure where the ring resonator is coupled to waveguides that are themselves coupled to laser sources and stabilization systems. The sensor unit integrates multiple functional components (laser sources, stabilization systems, waveguides, ring resonator) in a hierarchical nested arrangement, allowing compact integration while preserving the sensitivity benefits of larger-scale optical paths.
2Measurement precision
If multiple laser sources are used for quantum state generation, then measurement precision is improved, but device complexity and error-proneness increase
Solution Approach 1:
The patent merges multiple laser sources and their stabilization systems into a single integrated unit. The first laser source with its stabilization system and the second laser source with its stabilization system are both integrated into the sensor unit and coupled through waveguides to the ring resonator, reducing the need for separate external components and minimizing error-proneness.
3Device complexity
If chip-integrated design is implemented, then device complexity is reduced, but measurement precision may deteriorate
Solution Approach 1:
The patent implements a nested design where the ring resonator is coupled to waveguides that are coupled to laser sources. This hierarchical nesting allows the optical paths to be integrated on a chip while maintaining the effective optical path length needed for high sensitivity measurements. The ring resonator provides extended interaction length within a compact footprint.
Solution Approach 2:
The patent uses a ring resonator configuration that extends the optical path in a dimensional sense, allowing light to traverse a longer effective path length within a compact chip-integrated footprint. The ring structure enables multiple passes through the resonator, effectively increasing the measurement path length without proportionally increasing the physical chip area.
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 a highly sensitive and robust optical chip-integrated gyroscope capable of precise rotation measurements, reducing system complexity and cost by integrating all necessary components on a chip, including the generation of quantum states via four-wave mixing.
Implementation Method 1
A quantum state can be created using a ring resonator. By exploiting certain quantum states and measurement methods, a robust sensor over a wide temperature range is possible.
Implementation Method 2
For this purpose, the Hong-Ou-Mandel effect is used for entanglement or the intrinsic time-frequency entanglement or squeezing.
Implementation Method 3
the sensor unit can perform a very precise and robust measurement if the ring resonator can be fed with light from two different directions through the coupling waveguide
Data Source
AI summary
A sensor unit having a coupling-in waveguide and a coupling-in unit which couples a state present on the coupling-in waveguide to a first waveguide and a second waveguide. The sensor unit includes a first coupling-out unit that couples in a state present on the first waveguide to a coupling waveguide and couples out a state present on the coupling waveguide to a first coupling-out waveguide. The sensor unit includes a second coupling-out unit which couples in a state present on the second waveguide to the coupling waveguide and couples out a state present on the coupling waveguide to a second coupling-out which couples with the coupling waveguide, and a detection unit including at least one detector for detecting states present at or output from the at least first and/or second coupling-out waveguide or states dependent on these states.