High stability optomechanical system and cryo-package assembly for quantum computing

Patent metadata

Field	Value
Publication number	US-12474537-B2
Application number	US-202217883062-A
Country	US
Kind code	B2
Filing date	Aug 8, 2022
Priority date	Aug 6, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

Technologies for an optomechanical system include an intermediate plate having a top surface with multiple tapped holes arranged in a grid. A pair of dowel pin holes surround each tapped hole in a linear pattern. Multiple optical blocks are coupled to the intermediate plate using dowel pins positioned in the dowel pin holes and corresponding dowel pin holes defined in the bottom surface of the optical block. Each optical block includes multiple optical elements coupled to the top surface of the optical block with dowel pins. A cryostat may be coupled to the intermediate plate. A cryo-package assembly is mounted inside a cryo chamber of the cryostat. The cryo-package assembly includes a cryo device such as an ion trap covered by a machined copper lid. The lid includes a meandering passageway to allow for differential pumping in order to achieve ultra-high vacuum within the cryo-package assembly.

First claim

The invention claimed is:

1 . A cryo-package assembly comprising:
a package comprising a substrate configured to support a cryo device; a metallic lid coupled to the package, the lid comprising a top surface, a bottom surface, and a side wall extending between the top surface and the bottom surface, wherein a first opening is defined in the bottom surface and an inner wall extends inwardly from the first opening and defines an interior cavity, wherein when the lid is coupled to the package the cryo device is positioned within the interior cavity; and an imaging window coupled to the lid; wherein the lid defines a meandering passageway from a first end to a second end, wherein the first end is in communication with an exterior of the lid, and wherein the second end is in communication with the interior cavity, and wherein the meandering passageway defines a nonlinear path between the first end and the second end; wherein a second opening is defined in the top surface of the lid, wherein the second opening is in communication with the interior cavity, and wherein the top surface includes a groove extending along a nonlinear path to the second opening; wherein the imaging window is coupled to the lid and covers the second opening; wherein the imaging window and the groove cooperate to define the meandering passageway; wherein the lid further comprises an annular imaging window surround extending upward from the top surface of the lid, wherein the imaging window surround receives the imaging window; and wherein the imaging window surround includes a second inner wall extending upward from the top surface of the lid, wherein the second inner wall surrounds the second opening, wherein a second groove is defined in the second inner wall of the imaging window surround, wherein the second groove is in communication with the groove defined in the top surface, and wherein the imaging window and the second groove further define the meandering passageway.

2 . The cryo-package assembly of claim 1 , wherein the inner wall further defines a getter cavity in communication with the interior cavity, wherein the getter cavity is configured to receive a charcoal getter device, the charcoal getter device comprising activated charcoal packaged in a copper mesh.

3 . The cryo-package assembly of claim 1 , further comprising a ring frame coupled to the package, wherein the ring frame surrounds the cryo device, wherein the bottom surface of the lid defines a ring frame groove, and wherein when the lid is coupled to the package the ring frame groove receives the ring frame.

4 . The cryo-package assembly of claim 1 , wherein the cryo device comprises an ion trap device.

5 . The cryo-package assembly of claim 1 , wherein the lid further comprises a ground shield wall extending inwardly from the second opening to an inner end, wherein the inner end defines an aperture in communication with the interior cavity, and wherein the aperture is narrower than the second opening.

6 . The cryo-package assembly of claim 1 , wherein a plurality of tapped holes are defined in the top surface of the lid.

7 . The cryo-package assembly of claim 1 , wherein a side window opening is defined through the side wall, the cryo-package assembly further comprising a side window coupled to the lid in the side window opening and an ablation target positioned within the interior cavity, wherein the ablation target has a line of sight to the side window.

Assignees

• Univ Duke

Inventors

• Kim Jungsang
• Inlek Ismail
• Spivey Robert

Classifications

• G02B7/003 Primary

  Alignment of optical elements (G02B7/001, G02B7/002 take precedence; for mirrors G02B7/1822) · CPC title

• G01M11/04 Primary

  Optical benches therefor · CPC title