Yes here: https://katalog.devletarsivleri.gov.tr/

Here you will find all official resources provided by the Turkish state. You can register as a foreign citizen and conduct research. However, knowing Turkish is a great advantage. You can find more accurate documents by searching in the summaries, because all documents are archived with a short Turkish explanation - a summary. Also, most scanned images you want to download are paid.

Oh yeah I guess he researches at the one you're talking about in Istanbul. I actually was asking about a source for where you saw it translating ottoman, I thought you'd seen an article or something I could share to him. Sounds like you're the primary source though and I guess you already know him if you're both working there! Haha