Ring-Resonator Optical Gyroscope for Compact Quantum-Enhanced Sensing
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Solution Overview
Problem
Current optical gyroscopes are either large and bulky or lack sufficient sensitivity in chip-integrated applications, and existing quantum-enhanced solutions require costly single-photon sources and detectors that are either large or unreliable at room temperature.
Innovation Solution
A compact, chip-integrated optical gyroscope utilizing a ring resonator pumped with laser light to generate squeezed multiphoton quantum states, employing multimode interferometers and waveguides, without the need for costly single-photon sources, and using lattice couplers to minimize losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fiber-based or ring-laser-based gyroscopes are used to achieve high sensitivity, then measurement precision is improved, but the device becomes large and bulky
Solution Approach 1:
The patent implements a nested structure where ring resonators are integrated within a compact chip architecture. Multiple optical components including waveguides, beam splitters, and detectors are nested within a single integrated circuit platform, enabling the gyroscope to achieve high sensitivity without increasing device volume
Solution Approach 2:
The patent changes the operational parameters by using classical light fields instead of single-photon states, and by operating ring resonators at specific resonance frequencies to generate squeezed states. This parameter change enables high sensitivity measurement while maintaining a compact chip-integrated form factor
2Measurement precision
If single-photon sources and detectors are used to achieve quantum enhancement, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses classical light fields as copies or analogs of single-photon quantum states. By generating squeezed states through ring resonators using conventional light sources, the system replicates the quantum enhancement effects without requiring actual single-photon sources or detectors, thereby reducing device complexity
Solution Approach 2:
The patent substitutes quantum mechanical single-photon systems with classical optical systems. Instead of using single-photon sources and detectors, the invention employs classical light fields and ring resonators to achieve the same measurement precision through squeezed state generation, replacing complex quantum components with simpler classical optics
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
Achieves high sensitivity and compactness in measuring rotation rates with a reliable, cost-effective solution suitable for series production, operating over a wide temperature range.
Implementation Method 1
a ring resonator is pumped with light, which produces squeezed quantum states
Implementation Method 2
This is possible due to the Kerr effect in the ring resonator, as a result of which four-wave mixing occurs
Implementation Method 3
Due to the Sagnac effect, the effectively traveled length of the two light paths varies during a rotation of the system
Implementation Method 4
The first multimode interferometer in particular serves to divide laser light into two parts, which in particular have the same intensity
Implementation Method 5
The second multimode interferometer is in particular used to merge and entangle the quantum states from the ring resonators by means of the Hong-Ou-Mandel effect
Implementation Method 6
The third multimode interferometer in particular serves to merge the two interference paths and to dissolve the entanglement as a function of the phase shift
Implementation Method 7
using lattice couplers to minimize losses
Data Source
AI summary
An optical gyroscope assembly for measuring a rotation rate. The optical gyroscope assembly includes a first multimode interferometer with an input for receiving light and two outputs, each connected to a second light guide; a ring resonator on each of the second light guides; a second multimode interferometer with two inputs, each connected to one of the second light guides, and two outputs, each connected to a third light guide; and a third multimode interferometer with two inputs, each connected to one of the third light guides, and two outputs, each connected to a fourth light guide.