US 12,332,509 B2
Systems and methods for diffractive coherent laser combining
Qiang Du, Pleasanton, CA (US); Russell B. Wilcox, Berkeley, CA (US); Tong Zhou, San Pablo, CA (US); Lawrence R. Doolittle, Walnut Creek, CA (US); Gang Huang, Fremont, CA (US); and Derun Li, Concord, CA (US)
Assigned to The Regents of the University of California, Oakland, CA (US)
Filed by The Regents of the University of California, Oakland, CA (US)
Filed on Apr. 22, 2021, as Appl. No. 17/237,384.
Claims priority of provisional application 63/017,105, filed on Apr. 29, 2020.
Prior Publication US 2021/0341764 A1, Nov. 4, 2021
Int. Cl. G02B 27/10 (2006.01); G02B 27/42 (2006.01); G02F 1/01 (2006.01); H01S 3/00 (2006.01); H01S 3/067 (2006.01); H01S 3/23 (2006.01)
CPC G02F 1/0121 (2013.01) [G02B 27/1086 (2013.01); G02B 27/4277 (2013.01); H01S 3/0085 (2013.01); H01S 3/06754 (2013.01); H01S 3/23 (2013.01); G02F 2203/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical system comprising:
an optical source operable to generate a plurality of laser beams, each laser beam of the plurality of laser beams being a continuous-wave laser beam;
a plurality of phase shifters, each phase shifter operable to shift a phase of one of the plurality of laser beams generated by the optical source;
a diffractive optical element, the diffractive optical element operable to receive the plurality of laser beams and to diffract the plurality of laser beams to generate a plurality of output laser beams including a central laser beam and a plurality of side laser beams;
a detection device operable to measure a power of at least two of the plurality of output laser beams; and
a control system operable to determine, using a deconvolution method, a phase error in a laser beam of the plurality of laser beams from the power of the at least two of the plurality of output laser beams, and operable to direct N−1 phase shifters of the plurality of phase shifters to change a phase laser beams of the plurality of laser beams to increase a power of the central laser beam, with N being a number of the plurality of laser beams generated by the optical source.