US 11,894,873 B2
Photonic integrated circuit with inverted H-tree unit cell design
Stephen P. Palese, Redondo Beach, CA (US); Richard L. Kendrick, San Mateo, CA (US); and Moe D. Soltani, Belmont, MA (US)
Assigned to Raytheon Company, Tewksbury, MA (US)
Filed by Raytheon Company, Waltham, MA (US)
Filed on Jun. 29, 2022, as Appl. No. 17/809,608.
Prior Publication US 2024/0007185 A1, Jan. 4, 2024
Int. Cl. H04B 10/11 (2013.01); H04B 10/43 (2013.01)
CPC H04B 10/11 (2013.01) [H04B 10/43 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a photonic integrated circuit comprising an optical phased array, the optical phased array comprising multiple unit cells, each unit cell comprising:
multiple antenna elements configured to transmit or receive optical signals, a first subset of the antenna elements oriented in a first direction, a second subset of the antenna elements oriented in a second direction opposite the first direction;
multiple signal pathways configured to transport the optical signals to or from the antenna elements, at least some of the signal pathways having an “H” configuration; and
multiple phase modulators configured to modify phases of the optical signals being transported through the signal pathways.