Directly imaging and characterizing Earth-like exoplanets is a tremendously difficult instrumental challenge. Present coronagraphic systems have yet to achieve the required 10 − 10 broadband contrast in a laboratory environment, but promising progress toward this goal continues. An approach to starlight suppression is the use of a single-mode fiber (SMF) behind a coronagraph. By using deformable mirrors to create a mismatch between incoming starlight and the fiber mode, SMF can be turned into an integral part of the starlight suppression system. We present simulation results of a system with five SMFs coupled to shaped pupil and vortex coronagraphs. We investigate the properties of the system, including its spectral bandwidth, throughput, and sensitivity to low-order aberrations. We also compare the performance of the SMF configuration with conventional imaging and multiobject modes, finding improved spectral bandwidth, raw contrast, background-limited signal-to-noise ratio, and demonstrate a wavefront control algorithm, which is robust to tip/tilt errors.
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