We report on an experimental observation of dark incoherent soliton Y split
ting. The effects of incoherence on the evolution of incoherent dark solito
n doublets are investigated both theoretically and experimentally. We show
that the dynamics of these incoherent self-trapped entities are associated
with strong ''phase-memory" effects that are otherwise absent in the linear
regime. [S1063-651X(99)50205-5].