US 12,241,791 B2
Systems and methods for phase difference detection and control of electromagnetic arrays
Kenneth R. MacDonald, Sandia Park, NM (US)
Filed by Kenneth R. MacDonald, Sandia Park, NM (US)
Filed on Jan. 12, 2021, as Appl. No. 17/147,014.
Claims priority of provisional application 62/960,645, filed on Jan. 13, 2020.
Prior Publication US 2021/0215544 A1, Jul. 15, 2021
Int. Cl. G01J 9/02 (2006.01); H01S 3/10 (2006.01); H01S 3/13 (2006.01); H01S 3/23 (2006.01)
CPC G01J 9/02 (2013.01) [H01S 3/10053 (2013.01); H01S 3/2308 (2013.01); H01S 3/2383 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing a combined beam that has a desired wavefront:
producing a first electromagnetic beam that is propagating in a beam direction;
producing a second electromagnetic beam that is propagating in the beam direction and interferes with the first electromagnetic beam to produce an interference pattern;
obtaining a first power measurement from a first detector configured to measure the interference pattern at a first sample point in the interference pattern;
obtaining a second power measurement from a second detector configured to measure the interference pattern at a second sample point in the interference pattern;
determining a phase difference between the first electromagnetic beam and the second electromagnetic beam using the first power measurement and the second power measurement; and
changing a first beam phase of the first electromagnetic beam based on the phase difference to produce the combined beam that has the desired wavefront.