Read more in the "Quantum Computing in a Piece of Glass" white paper.
An interesting idea, but as I stated, my knowledge is a few decades old. I am sure there are many new photonic engineers who are much more in tune with the current technology.
While I probably could not help much, I can see many potentials for the technology based upon some of the programs I used to work on.
Like I posted earlier, keep an eye on this one. It could soon get interesting.
I worked on some interferometer fringe analysis devices back in the 1980's. If they have improved the optics and combined them with new image processing algoritims, these devices could yeild some very interesting devices.
I can see a lot of the technology that was not available then, coming to fruition in recent years. They might actually begin to get optical computing devices practical enough to use.
Definitely need to keep an eye on this research.