Polymer-based optical interconnects using nanoimprint lithography

The increasing request for higher data speeds in the information and communication technology leads to continuously increasing performance of microprocessors. This has led to the introduction of optical data transmission as a replacement of electronic data transmission in most transmission applications longer than 10 meters. However, a need remains for optical data transmission for shorter distances inside the computer. This paper gives an overview of the Joint European project FIREFLY, in which new polymer based single mode waveguides are developed for integration with VCSELs, splitters and fibers that will be manufactured using multi-layer nanoimprint lithography (NIL). Innovative polymers, new applications of nano-technology, new methods for optical coupling between components, and the integration of all these new components are the technical ingredients of this ambitious project. New polymers: developments in siloxane based polymers will be discussed to reduce the optical loss at datacom and telecom wavelengths. These new polymers can already be processed using processes such as direct laser writing. New production processes: the implementation of the new polymers in multi-layer NIL will be assessed. The polymer cladding and core is structured at micrometer scale to create dense networks of single mode waveguides. The NIL process is a suitable technique for mass production. Integration: new concepts will be presented that will optimize the coupling of the components and reduce the optical losses that arise in coupling the lasers to waveguides, waveguides to fibres, and in 45° or 90° bends