Read the corporate presentation and if you still have questions I am sure someone will take the time to help you out with the list of improvements the POET dielectric platform offers namely why it offers the lowest cost solution ($1/G) that industry has targeted. Key words are lossless, athermal, footprint, passive alignment, fully CMOS compatiable due to the low temperature process flow of the dielectric.

Optics and electronics do not co-exist well due to very different process flows, material sets and thermal management constraints. POET has a very elegant solution that can be ramped very quickly and the production steps are greatly simplified.