Hello Sparta, welcome, I see it is your first day.

If you are referring to what the acronym POET stands for, Planar Optical Electronic Technology, then the answer is no; to my knowledge there is no one else with this type of technology.

I suggest reading the POET website and the many contributions from the people here (link library/press releases, etc.) and bringing yourself up to speed on what's happening; then your questions will be more relevant.