Wavefront control for minimization of speckle coupling into a fiber injection unit based on the electric field conjugation algorithm

Abstract

control for minimization of speckle coupling into a fiber injection unit based on the electric field conjugation algorithm,"

Simulations of a high-contrast single-mode fiber coronagraphic multiobject spectrograph for future space telescopes

“…Ref. 23 and 31 were the first to use EFC through a SMF and demonstrate its effectiveness in the lab. We build on that work here by controlling multiple fibers over a much broader spectral band than they did.…”

“…Ref. 23 demonstrated the use of electric field conjugation (EFC) 24 with a SMF, using it as an integral part of the wavefront control system of the coronagraph.…”

A multi-object spectrograph using single-mode fibers with a coronagraph: progress towards laboratory results on the high-contrast testbed for segmented telescopes

“…20 is the use of electric field conjugation (EFC) 26 with a SMF. 27 A SMF acts as a spatial filter, rejecting light which does not match the mode shape of the fiber. This property means that a SMF can be used as part of a wavefront control system 19, 21-23, 27, 28 -in our case, instead of traditional EFC which attempts to use deformable mirrors (DMs) to null residual starlight in the image plane of a coronagraph, with fiber EFC, the output of the fiber is minimized instead.…”