From T. Mika presentation:

Right now what we are doing is we’re taking data from our optical interposer based prototypes and providing that data to a long list of customers that we’ve engaged with over the past two years.

"Come back to us when you have some data and you have a device that you can share with us.”

( I expect that quite a few prototypes have been produced to ship out.)

So we’re now at that point of being able to provide data on the performance of devices which is actually exceeding our own internal expectations for how well they are performing.

(I don't expect to see these extraordinary performance numbers until after POET has produced, and shipped their marketing packages to our many potential customers, but it has to be considered a watershed moment imo.)