US 11,988,903 B2
Photonic integrated circuit-based optical phased array calibration technique
Niraj K. Inamdar, Rolling Hills Estates, CA (US); Stephen P. Palese, Redondo Beach, CA (US); Aaron B. Potter, Torrance, CA (US); and Thomas R. Yengst, Boise, ID (US)
Assigned to Raytheon Company, Tewksbury, MA (US)
Filed by Raytheon Company, Waltham, MA (US)
Filed on Feb. 11, 2021, as Appl. No. 17/174,197.
Prior Publication US 2022/0252908 A1, Aug. 11, 2022
Int. Cl. G02F 1/01 (2006.01); G01N 21/88 (2006.01); G02F 1/29 (2006.01); H01Q 3/26 (2006.01); H04B 10/11 (2013.01); H04B 10/112 (2013.01); H04B 10/40 (2013.01)
CPC G02F 1/0147 (2013.01) [G01N 21/8806 (2013.01); G02F 1/292 (2013.01); H01Q 3/267 (2013.01); H01Q 3/2676 (2013.01); H04B 10/11 (2013.01); H04B 10/112 (2013.01); G02F 2203/50 (2013.01); H04B 10/40 (2013.01)] 20 Claims
OG exemplary drawing
 
8. An apparatus comprising:
at least one processor configured to:
capture near-field measurements of a mixed optical beam comprising a combination of (i) an output optical beam produced by an optical phased array and (ii) a reference optical beam, the optical phased array comprising multiple array elements, each array element comprising an antenna element and a phase modulator;
generate calibration data based on the near-field measurements, the calibration data identifying phase and amplitude responses of the array elements; and
store the calibration data.