The desecration is a process that removes a priest from the priesthood. Pope Francis endorsed Poulson's "liberation from all obligations associated with the sacred orders (priesthood)," says the diocese.
The authorities accused Poulson of having repeatedly sexually assaulted a boy in two churches, claiming he was trying to attack another boy with a hunting lodge he owned with a friend.
Poulson, who served four decades of the Catholic Church, was sentenced to 2.5-14 years in Pennsylvania.
"Mr. Poulson has now been removed from the clerical state priest in the Catholic Church and should no longer present himself as a priest and be included as a priest in the celebration of the sacraments," said Bishop Lawrence T. Persico in a statement.