LOL! Oh this is getting fun now. Are you denying the Ottoman Empire was an Islamic Empire? And just how many Islamic "empires" do you think there were?
Not at all. Are you going to answer the question? The Arab Islamic empire(Moslem Empire) is not the same as the Ottoman empire. The Moslem empire began with Mohammed and continued through the various Caliphates and families that descended from Mohammed. It is generally thought to have "ended" around 1032 or so IIRC.