Quantum computers were theorized in 1980, and there still isn't even a basic prototype. 18 years later, the first 2-qubit quantum computer was built. There still isn't anything usable after 40 years.
If it's economically viable, I'd bet we will see it in 15 years. There are libraries for quantum algorithms in multuple languages, and I remember trying to learn them in Haskell pre-2010, with the assumption that by the time I wrapped my head around it a decade or two later, there would be computers to run it on. I gave up on that, but from an investor perspective, a game changing improvement in classical compute tech is worth considering exposure to.
Are you seriously confident this optical compute model, if economical, is 30+ years away?