Data transmission is not the same as data processing and bandwidth from component A to component B is rarely the primary limiting factor in performance.
Optical/photonic computing is a fascinating topic, but thinking it's currently some sort of drop in replacement for electrical circuits, or that an interconnect constitutes a processor, are grievous fallacies.
A short article on the general topic...pay particular attention to the 'challanges' section:
https://www.findlight.net/blog/2019/02/01/optical-computing/
You've described the theoretical throughput of some sort of vague optical interconnect which does not remotely constitute a computer, let alone a product that Frontier could acquire.
Just because you have millions of LEDs and some fiber optic cable doesn't mean you could build a useful, much less super, computer with them.
The optical components you haven't described aren't doing anything except acting as a loopback.
OP is proposing a 1GHz, 16.7 million bit, optical interconnect that would provide vastly more bandwidth than the hardware it's connected to could use while harming performance by requiring latency introducing conversion at each end.
This is a bunch of treknobabble that features vague references of an optical computer (the 'read device') doing some sort of processing, but doesn't make any coherent mention of where this optical computer would come from.
The smallest LEDs are many orders of magnitude larger than modern transistors and you'd require far more than just an LED to make an optical transistor equivalent. You could use them as part of a set of logic gates that talked to each other with flashing light, but they'd be enormous, and enormously slow, compared to an equivalent integrated circuit.
Even real proposals for photonic transistors are likely to be limited to signal routing applications because they may never be competitive for processor logic. Faster theoretical switching speed, even if fully realized, likely wouldn't overcome the density penalty. If you can cram a hundred times as many electronic transistors in the same area, they are going to make a much faster processor, even if they cannot cycle as fast.
