Atomic Chip With Two Conductive Strips for Three-Axis Inertial Sensing
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Solution Overview
Problem
Existing ultracold atom sensors are limited to measuring angular velocity along a single axis and require complex, bulky setups for measuring along three axes, which are expensive and prone to precision loss due to time drift.
Innovation Solution
A simplified atomic chip design with symmetrically arranged waveguides and conductive strips allows for the measurement of angular velocity along three perpendicular axes (X, Y, Z) by configuring microwave signals and direct currents to create and move atom traps in closed trajectories, enhancing sensitivity and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate sensors are used to measure angular velocity along three axes, then measurement capability along multiple axes is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines three separate single-axis measurement sensors into a single integrated atomic sensor that can measure angular velocity along three perpendicular axes simultaneously. The atom chip integrates multiple waveguide pairs and conductive elements that generate magnetic traps capable of manipulating ultracold atoms along X, Y, and Z axes, eliminating the need for multiple separate sensor assemblies and their complex alignments.
Solution Approach 2:
The atomic sensor achieves multi-functionality by using the same fundamental atomic interference mechanism to measure angular velocity along three different axes. The waveguide pairs and conductive elements are configured to create magnetic traps that can guide atoms along different trajectories corresponding to different measurement axes, allowing a single device to perform multiple measurement functions.
2Measurement precision
If complex alignment procedures are used for multi-axis measurement, then measurement precision is improved, but time drift and precision loss increase
Solution Approach 1:
The patent segments the measurement function into three independent atomic interference pathways corresponding to three perpendicular axes. Each axis measurement uses a dedicated pair of waveguides and associated conductive elements, allowing independent optimization and calibration of each measurement channel while maintaining a unified atomic source and detection system. This segmentation reduces cumulative alignment errors.
Solution Approach 2:
The patent replaces mechanical alignment procedures with magnetic field-based trap positioning. The magnetic traps generated by the waveguides and conductive elements can be precisely positioned and adjusted through electromagnetic control rather than mechanical adjustment, eliminating time drift associated with mechanical components and improving long-term measurement stability.
3Ease of manufacture
If simple atomic chip design is used, then manufacturing cost and complexity are reduced, but measurement sensitivity decreases
Solution Approach 1:
The patent enhances measurement sensitivity by utilizing three-dimensional atomic trap manipulation. The waveguide pairs are arranged in multiple layers and orientations, creating magnetic traps that can confine and guide atoms in three-dimensional space. This 3D configuration increases the effective measurement area and atom trajectory length, improving sensitivity without requiring a larger chip footprint.
Solution Approach 2:
The atomic chip employs composite structures combining superconducting waveguides with normal conductive elements. The superconducting waveguides provide low-loss microwave transmission for precise magnetic field control, while the normal conductive elements provide magnetic field gradients for trap formation. This composite approach achieves high measurement sensitivity with a manufacturable chip design.
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 new chip design enables efficient, sensitive measurement of angular velocity along multiple axes with improved precision and reduced complexity, eliminating the need for multiple sensors and complex alignments.
Implementation Method 1
Rotation measurements on this type of device are carried out by exploiting the Sagnac effect. The phase shift θ induced by the Sagnac effect between two counter-rotating matter waves in a frame of reference rotating at angular speed Ω
Implementation Method 2
The chip comprises means adapted to generate a first ultracold atom trap T1 and a second ultracold atom trap T2, a trap making it possible to immobilize a cloud of ultracold atoms 12
Implementation Method 3
The means comprise a first waveguide CPW1 and a second waveguide CPW2 adapted to the propagation of microwaves at pulsations ωa and ωb
Implementation Method 4
a first conductive strip and a second conductive strip arranged so that their respective projection in the XY plane form at their intersection a second parallelogram
Data Source
Figure 1
Figure 2a~2c
Figure 3a~3b
AI summary
The invention relates to an atomic chip (Ach) for an ultracold atom sensor, the atomic chip comprising: - a first pair of waveguides, - a second pair of waveguides, the projections of the guides along X and of the guides along Y' in the XY plane forming at their intersection a first parallelogram (P1) with center O and having a first surface (S1), - a first conductive ribbon (W1) and a second conductive ribbon (W2) arranged so that their respective projections in the XY plane form at their intersection a second parallelogram (P2) also with center O and having a second surface (S2), said ribbons being adapted to be traversed by direct currents, - an intersection between the first (S1) and the second (S2) surface being greater than or equal to 40% of the first surface (S1).