Just so people understand. This is one part of the advantage offered by the POET platform. As we will recall Suresh is targeting insertion loss to be significantly better than existing technologies. Which ultimately means lower power requirements both in signal generation and thermal control requirements (a more efficient platform allowing for higher sensitivity).

It is not just about passive alignment achieved by this die attach process which in itself could like be applied to other platforms to improve efficiencies in the world of semiconductor process steps. 

It is the ability to fine tune the dielectric precisely to the waveguide mode...Slide 16 https://poet-technologies.com/docs/presentations/POET%20CIOE%20Presentation_Sept_2018_FINAL.pdf

And extremely accurate wavelength separation for higher level wavelength division multiplexing. More data per fiber in future standards.