Optical path redirected three-dimensional lightguide connectors for high-speed interconnection modules

Increasing demands for communication bandwidth are driving the need for low-cost and integrated connectivity in optical network systems. In this paper, we describe one solution for implementation of cost effective and highly integrated optical interconnects. VCSEL/PD are suited for optical interconnects because they are able to make two-dimensional arrays for higher-integration. This paper describes two-type novel lightguide connectors for VCSEL/PD. The concepts of these connectors are as follows: (1) matrix arrayed multi-channel optical I/Os and optical path redirection for efficient coupling to 50 μm diameter multi-mode fiber, (2) connectivity to commercially available multi-channel connectors, (3) low cost fabrication, (4) high-speed transmission performance. In order to meet these concepts, we proposed three-dimensional lightguide devices having matrix arrayed cores and reflective mirror for optical path redirection. By using these lightguide devices, pigtail connectors were fabricated for cost reduction and down sizing of the connector volumes. Receptacle connectors with fully compatibility to surface mount technology (SMT) were fabricated to have great advantages for low cost and mass production. Both connectors can be coupled to commercially available MT connectors and have sufficient high-speed transmission performance. These connectors have the potential to achieve low cost fabrication and higher integration in the optical interconnects.