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Electro-optical circuit boards with single- or multi-mode optical interconnects

: Brusberg, L.; Immonen, M.; Lamprecht, T.


Tekin, T.:
Optical Interconnects for Data Centers
Amsterdam: Elsevier, 2017 (Woodhead publishing series in eletronic and optical materials 90)
ISBN: 978-0-08-100512-5
ISBN: 978-0-08-100513-2
ISBN: 0-08-100513-X
ISBN: 0-08-100512-1
Book Article
Fraunhofer IZM ()

Embedded optical architectures are required in data center and network systems to replace the electrical signal lines with optical interconnects for increased high-speed data transmission due to the higher bandwidth by length product. MT terminated fiber- or polymer flex parallel optical interconnects seem to be the first step of implementation in commercial applications, without the need to change the printed circuit board (PCB) stack-up design and fabrication process flow and provide standard connector interfaces. However, integration of optical polymer or glass waveguide layers in the PCB stack-up benefits in low-cost high-volume waveguide fabrication with complex layouts including splitters, combiners, crossings, and tight bends. The chapter introduces state-of-the-art electro-optical circuit board fabrication technologies, termination, and performance demonstration for optical waveguides made of polymer and glass.