US 12,248,177 B2
Waveguide crossings with a multiple-level non-contacting arrangement
Yusheng Bian, Ballston Lake, NY (US)
Assigned to GlobalFoundries U.S. Inc., Malta, NY (US)
Filed by GlobalFoundries U.S. Inc., Malta, NY (US)
Filed on Jul. 21, 2022, as Appl. No. 17/869,858.
Prior Publication US 2024/0027685 A1, Jan. 25, 2024
Int. Cl. G02B 6/125 (2006.01); G02B 6/136 (2006.01); G02B 6/12 (2006.01)
CPC G02B 6/125 (2013.01) [G02B 6/136 (2013.01); G02B 2006/12119 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A structure for a waveguide crossing, the structure comprising:
a first waveguide core including a first section, a second section, and a first waveguide bend connecting the first section to the second section, the second section terminating the first waveguide core, and the first waveguide core having a first side surface extending about the first waveguide bend;
a second waveguide core including a first section, a second section, and a second waveguide bend connecting the first section to the second section, the second section terminating the second waveguide core, the second waveguide core having a second side surface extending about the second waveguide bend, and the second waveguide bend spaced from the first waveguide bend by a gap between the second side surface and the first side surface;
a third waveguide core including a section terminating the third waveguide core, the section of the third waveguide core positioned in a vertical direction relative to the second section of the first waveguide core, and the section of the third waveguide core and the second section of the first waveguide core having a first overlapping arrangement; and
a fourth waveguide core including a section terminating the fourth waveguide core, the section of the fourth waveguide core positioned in the vertical direction relative to the second section of the second waveguide core, and the section of the fourth waveguide core and the second section of the second waveguide core having a second overlapping arrangement,
wherein the vertical direction is perpendicular to a horizontal direction, the first section of the first waveguide core is aligned along a first longitudinal axis, parallel to the horizontal direction the first section of the second waveguide core is aligned along a second longitudinal axis, parallel to the horizontal direction and the first longitudinal axis is substantially collinear with the second longitudinal axis.