High-bandwidth atom-interferometric gravimetry and accelerometry
US11456086B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2020 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Dec 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V7/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A high bandwidth gravimeter or accelerometer includes laser(s), modulator(s), and an atomic interferometer. The laser(s) and modulator(s) produce four laser frequencies. A first and second pair of laser frequencies are each separated by wm. The first and second pair are offset by wshift. A first laser frequency of the first pair and a second laser frequency of the second pair are separated by wm+wshift. A second laser frequency of the first pair and a first laser frequency of the second pair are separated by wm−wshift. The first pair is routed to arrive from a first direction at atoms in an interaction region, and the second pair from a second direction. The first pair are phase stable with respect to the second pair. wm is adjusted so that wm+wshift or wm−wshift corresponds to a Raman resonance for the atomic interferometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.