Tannersfriend: Question: Is PET a part in our VCSEL transceiver? Ah!!!
Yes, of course it is. POET is a superset of PET. PET is electronics only, while POET is electronics plus optics. PET would be a partial solution only, POET is the full one.
If you could place a "POET inside" sticker on a device, you could also stick "PET inside" on it. But why should you?