The phrase "sorry for the laugh" can be interpreted in a few ways, depending on the context. If you are expressing regret for having made someone laugh at an inappropriate time or if the laughter was at someone's expense, then it makes sense to say it that way. However, if you are apologizing for simply causing someone to laugh in a light-hearted or joyful context, it may not be necessary to apologize.
If you want to convey that you did not