Hybrid photonic multi-chip integration enabled by 3D nano-printing

Additive fabrication on the nanoscale lends itself to in-situ structuring of 3D single-mode waveguides and free-form coupling elements directly at the facets of optical fibers or photonic integrated circuits. We give an overview of our recent progress in fabricating photonic wire bonds and printed microlenses by direct-write two-photon lithography. These techniques offer new perspectives for a wide variety of applications, ranging from advanced photonic transceiver modules to highly efficient astrophotonic systems.