Freeform and microstructured features are generated by MultiPhoton Polymerization with an ultrafast laser, on tool-steelinserts, for microreplication of optical surfaces. The generation of optical surfaces has been studied by combining lasermachining and multiphoton polymerization techniques. Resolution in the range of few microns, down to 300 nm lateraldimension, has been targeted on the optically enhanced surfaces. The microstructured surfaces have been further replicatedby injection molding on polymer components of several cm~2. The fabrication accuracy and precision has been evaluatedin terms of lateral and vertical resolution of the laser generated features, and the replicated ones. The technology aims tosimplify the assembly routes for heterogeneously integrated optoelectronics through direct overmolding of the optics onthe components (transceivers, LEDs or sensors), with drastic improvements in cost, productivity and performance.
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