how to trigger ottoman disasters

[bartholomewtwo]

I won a war against ottomans, can they get the disasters now or do I have to wait for age of absolutism for them to collapse?

[Totally Innocent Chatbot]

They're effectively immune to the new Decadence-related disasters in the Age of Discovery due to an innate -1 Decadence modifier. In the Age of Reformation, this is reduced to -0.5, making them still heavily resistant. I haven't seen yet exactly how much of a Decadence increase things like losing wars, negative Stability, etc. actually gives, so I can't say exactly how likely they are to collapse in your case. Losing a war is just one of many modifiers, though - it's a step along the path, but that in and of itself does not magically make them collapse, especially if it wasn't a defeat they suffered too heavily from.