Vapor cell for atomic physics sensors

Patent metadata

Field	Value
Publication number	US-12188784-B2
Application number	US-202117552909-A
Country	US
Kind code	B2
Filing date	Dec 16, 2021
Priority date	Dec 17, 2020
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

One embodiment includes a vapor cell for an atomic physics-based sensor system. The vapor cell includes a cell wall formed from an approximately transparent material. The cell wall can enclose an alkali metal vapor and can include an inner surface and an outer surface. The vapor cell can also include at least one structural feature provided on at least one of the inner surface and the outer surface of the cell wall and extending along a portion of the respective at least one of the inner surface and the outer surface.

First claim

What is claimed is:

1. A vapor cell for an atomic physics-based sensor system, the vapor cell comprising:
a cell wall formed from an approximately transparent material, the cell wall enclosing an alkali metal vapor and comprising an inner surface and an outer surface, the cell wall having a first thickness between the inner surface and the outer surface; and
at least one structural feature formed integral with the cell wall and extending along a portion of at least one of the inner surface and the outer surface, each of the at least one structural feature being arranged as a portion of the cell wall having a thickness that is greater than the first thickness to increase structural integrity of the cell wall.

2. The cell of claim 1 , wherein the respective one of the inner surface and the outer surface of the cell wall on which the at least one structural feature is provided has a total surface area comprising a first portion of the total surface area on which the at least one structural feature is provided and a second portion of the total surface area on which the at least one structural feature is absent, the second portion of the total surface area being greater than the first portion of the total surface area.

3. The cell of claim 1 , wherein the at least one structural feature is formed from the approximately transparent material.

4. The cell of claim 1 , wherein the at least one structural feature is formed from chemical etching portions of the outer surface of the cell wall to form the at least one structural feature between the etched portions of the outer surface of the cell wall.

5. The cell of claim 1 , wherein the cell wall is arranged as a tubular vapor cell, wherein the at least one structural feature is formed as rings that circumscribe the respective one of the outer surface and the inner surface of the cell wall and are arranged parallel with respect to each other along a length of the tubular vapor cell.

6. The cell of claim 1 , wherein the at least one structural feature is arranged as a respective at least one discrete component that is bonded to the at least one of the outer surface and the inner surface.

7. A physics-based sensor system comprising the vapor cell of claim 1 .

8. A method for forming a vapor cell for an atomic physics-based sensor system, the method comprising:
forming a cell wall from an approximately transparent material, the cell wall comprising an inner surface and an outer surface and having a first thickness between the inner surface and the outer surface;
forming at least one structural feature integral with the cell wall and extending along a portion of the respective at least one of the inner surface and the outer surface, each of the at least one structural feature having a thickness that is greater than the first thickness to provide regions of varying dielectric constant of the cell wall; and
sealing the vapor cell to enclose an alkali metal vapor within the vapor cell.

9. The method of claim 8 , wherein the respective one of the inner surface and the outer surface of the cell wall on which the at least one structural feature is formed has a total surface area comprising a first portion of the total surface area on which the at least one structural feature is formed and a second portion of the total surface area on which the at least one structural feature is absent, the second portion of the total surface area being greater than the first portion of the total surface area.

10. The method of claim 8 , wherein forming the at least one structural feature integral with the cell wall comprises chemical etching portions of the outer surface of the cell wall to form the at least one structural feature between the etched portions of the outer surface of the cell wall.

11. The method of claim 8 , wherein forming the cell wall comprises forming the cell wall as a tubular vapor cell, wherein forming the at least one structural feature comprises forming the at least one structural feature as rings that circumscribe the respective one of the outer surface and the inner surface of the cell wall and are arranged parallel with respect to each other along a length of the tubular vapor cell.

12. A vapor cell for an atomic physics-based sensor system, the vapor cell comprising:
a cell wall formed from an approximately transparent material, the cell wall enclosing an alkali metal vapor and comprising an inner surface and an outer surface; and
at least one structural feature provided on at least one of the inner surface and the outer surface of the cell wall and extending along a portion of the respective at least one of the inner surface and the outer surface, the at least one structural feature comprising at least one discrete component that is bonded to the at least one of the outer surface and the inner surface to increase structural integrity of the cell wall.

13. The cell of claim 12 , wherein the respective one of the inner surface and the outer surface of the cell wall on which the at least one structural feature is provided has a total surface area comprising a first portion of the total surface area on which the at least one structural feature is provided and a second portion of the total surface area on which the at least one structural feature is absent, the second portion of the total surface area being greater than the first portion of the total surface area.

14. The cell of claim 12 , wherein the at least one structural feature is formed from the approximately transparent material.

15. The cell of claim 12 , wherein the cell wall has a first thickness between the inner surface and the outer surface, wherein each of the at least one structural feature is arranged as a portion of the cell wall having a thickness that is greater than the first thickness.

16. A vapor cell for an atomic physics-based sensor system, the vapor cell comprising:
a cell wall formed from an approximately transparent material, the cell wall enclosing an alkali metal vapor and comprising an inner surface and an outer surface; and
at least one structural feature provided on at least one of the inner surface and the outer surface of the cell wall and extending along a portion of the respective at least one of the inner surface and the outer surface, the at least one structural feature comprising at least one discrete component that is bonded to the at least one of the outer surface and the inner surface to provide regions of varying dielectric constant of the cell wall.

17. The cell of claim 16 , wherein the respective one of the inner surface and the outer surface of the cell wall on which the at least one structural feature is provided has a total surface area comprising a first portion of the total surface area on which the at least one structural feature is provided and a second portion of the total surface area on which the at least one structural feature is absent, the second portion of the total surface area being greater than the first portion of the total surface area.

18. The cell of claim 16 , wherein the at least one structural feature is formed from the approximately transparent material.

19. The cell of claim 16 , wherein the cell wall has a first thickness between the inner surface and the outer surface, wherein each of the at least one structural feature is arranged as a portion of the cell wall having a thickness that is greater than the first thickness.

Assignees

• Imhof Eric A
• Spence Thomas G
• Jefferts Steven Ryan
• Bulatowicz Michael D
• Northrop Grumman Systems Corp

Inventors

• Imhof Eric A
• Spence Thomas G
• Jefferts Steven Ryan
• Bulatowicz Michael D

Classifications

• G04F5/14

  using atomic clocks · CPC title

• G01D11/245 Primary

  Housings for sensors · CPC title

• G01R33/26 Primary

  using optical pumping · CPC title