  The next generation of ground-based instruments aims to break through the
knowledge we have on exoplanets by imaging circumstellar environments always
closer to the stars. However, direct imaging requires an AO system and
high-contrast techniques like a coronagraph to reject the diffracted light of
an observed star and an additional wavefront sensor to control quasi-static
aberrations, including the non common path aberrations. To observe faint
objects, a focal plane wavefront sensor with a sub-nanometric wavefront control
capability is required. In the past few years, we developed the THD2 bench
which is a testbed for high-contrast imaging techniques, working in visible and
near infrared wavelengths and currently reaching contrast levels lower than
1e-8 under space-like simulated conditions. We recently added a turbulence
wheel on the optical path which simulates the residuals given by a typical
extreme adaptive optics system and we tested several ways to remove
quasi-statics speckles. One way to estimate the aberrations is a method called
pair-wise probing where we record few images with known-shapes we apply on the
adaptive optics deformable mirror. Once estimated, we seek to minimize the
focal-plane electric field by an algorithm called Electric Field Conjugation.
In this paper, we present the first results obtained on the THD2 bench using
these two techniques together in turbulent conditions. We then compare the
achieved performance with the one expected when all the quasi-static speckles
are corrected.
