5σ detectivity for the LSC (left) and ALSC (right) after attenuation of the speckles with the SD method. The data was simulated assuming bright AO guide star and without detection noise to be in a regime truly limited by speckle noise. The plots show the contrast curves at λ = 1.65 μm with the PSF profile (plain), the coronagraphic profile (dotted), and the 5σ noise level after SD (dashed). The hatched area corresponds to the location of the opaque coronagraphic mask.