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We give an overview of our recent progress on interfacing components for short-reach optical interconnects fabricated through two-photon polymerization-based laser direct writing. We show mode field conversion tapers printed on single-mode optical fibers for easy and efficient interfacing to various photonic integrated circuits, circular and square planar waveguide structures with V-groove inspired alignment structures for easy coupling to fibers and fan-out diffractive optical elements. For all these components, we present the process flow from optical design and simulation over laser direct writing fabrication and metrology to proof-of-concept demonstration.
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J. Van Erps, K. Vanmol, T. Baghdasaryan, T. Geernaert, N. Vermeulen, H. Thienpont, "Laser direct writing of short-range interconnect interfacing structures," Proc. SPIE 12007, Optical Interconnects XXII, 120070B (5 March 2022); https://doi.org/10.1117/12.2606030