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

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.