Quantum weak-value birefringent Coriolis vibratory gyroscope

Patent metadata

Field	Value
Publication number	US-12270653-B2
Application number	US-202217721094-A
Country	US
Kind code	B2
Filing date	Apr 14, 2022
Priority date	Apr 14, 2022
Publication date	Apr 8, 2025
Grant date	Apr 8, 2025

Abstract

A device is provided for rotation rate measurement. The device includes a laser, pre- and post-selection polarizers, a birefringent crystal, and a detector. The laser emits a photon beam. The crystal separates the beam into separate parallel beams by phase difference in response to the rotation rate as measured by the detector.

First claim

What is claimed is:

1. A device for measurement of rotation rate, said device comprising:
a vertical-cavity surface-emitting laser for emitting an optical beam of photons along a drive axis orthogonal to rotation and sense axes;
a first polarizer for pre-selection of said optical beam into equal superposition of pre-selection polarization states in horizontal and vertical planes;
a birefringent crystal composed of uniaxial mineral crystal silicon dioxide for weakly interacting with and splitting said optical beam of photons into a mutually in-phase pair of parallel beams of photons that emerges from said birefringent crystal along said drive axis and separated along said sense axis, said optical beam intersecting said birefringent crystal at an incidence angle;
a second polarizer for post-selection of said pair of parallel beams into post-selection polarization states nearly orthogonal to said pre-selection polarization states;
a detector for registering said parallel beams of photons; and
a platform onto which said laser, said first polarizer, said crystal, said second polarizer and said detector are sequentially disposed parallel to said vertical plane, wherein
said parallel beams are distinguished by horizontal and vertical polarizations relative to said birefringent crystal, and separate by phase difference in response to the rotation rate about said rotation axis, and
said birefringent crystal weakly interacts with said optical beam to amplify said phase difference.

2. The device according to claim 1 , wherein said laser and said first polarizer combine as a polarizing laser.

3. The device according to claim 1 , wherein said phase difference corresponds to peak position expectancy at coherency points of said birefringent crystal with spatial translation across said parallel beams.

4. The device according to claim 1 , wherein said parallel beams are ordinary and extraordinary rays.

5. The device according to claim 4 , wherein said ordinary ray varies in amplitude in said horizontal plane of said drive and sense axes, and said extraordinary ray varies in amplitude in said vertical plane of said rotation and sense axes.

Assignees

• Josemans Garrett K
• Baldwin Benjamin A
• Us Navy

Inventors

• Josemans Garrett K
• Baldwin Benjamin A

Classifications

• G01C19/5614

  Signal processing · CPC title

• G01C19/5649

  Signal processing · CPC title

• G01C19/661 Primary

  details · CPC title

• G01C19/56 Primary

  Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces · CPC title