The Space Coronagraph Optical Bench (SCoOB): 9. improvements to adjoint electric field conjugation and a demonstration in broadband light

We report on recent development in using adjoint electric field conjugation (aEFC) on the University of Arizona’s Space Coronagraph Optical Bench (SCoOB). In its current configuration, SCoOB is a charge-6 vector vortex coronagraph outfitted with a Kilo-C microelectromechanical systems deformable mirror capable of achieving sub-10^-8 dark hole contrast at visible wavelengths. In this work, we discuss ongoing efforts in improving adjoint model calibration. Using this improved model, we give an updated comparison between aEFC and iEFC for dark hole digging on SCoOB. Finally, we provide the first demonstration of aEFC on SCoOB in broadband light.