Herein we report on our Visible Nulling Coronagraph high-contrast result of 109 contrast averaged over a focal plane
region extending from 1 – 4 λ/D with the Vacuum Nuller Testbed (VNT) in a vibration isolated vacuum chamber. The
VNC is a hybrid interferometric/coronagraphic approach for exoplanet science. It operates with high Lyot stop
efficiency for filled, segmented and sparse or diluted-aperture telescopes, thereby spanning the range of potential future
NASA flight telescopes. NASA/Goddard Space Flight Center (GSFC) has a well-established effort to develop the VNC
and its technologies, and has developed an incremental sequence of VNC testbeds to advance this approach and its
enabling technologies. These testbeds have enabled advancement of high-contrast, visible light, nulling interferometry to
unprecedented levels. The VNC is based on a modified Mach-Zehnder nulling interferometer, with a “W” configuration
to accommodate a hex-packed MEMS based deformable mirror, a coherent fiber bundle and achromatic phase shifters.
We give an overview of the VNT and discuss the high-contrast laboratory results, the optical configuration, critical
technologies and null sensing and control.