Methods, systems, and apparatus are presented for enabling unlimited roaming service on a roaming partner switch. An optical element, including a lens, is engaged in the ferrule between the first and second ends and positioned to convey light along the optical axis. The grating coupler acts to couple the vertically emitted light from the hybrid vertical cavity into a silicon waveguide formed on an SOI wafer. A third mechanism for combining the first portion of electromagnetic energy and the second portion of electromagnetic energy to yield a uniform reference beam. A plate 320 with protrusions 320 is raised into a substrate tray 100 with holes.