This paper proposes a novel polymer optical fiber coupler, which use thin optical fiber bundle to split and combine the light between thick POFs. The advantages of the coupler over mixing rod coupler include reduced coupling loss, elimination of fiber bending loss, and flexible in design of splitting ration and number of ports. The construction of the coupler is described in detail. The design ofthe thin optical fiber bundle and the relationship between quantity of fibers in bundle and packing fraction are analyzed. 31-fibers bundle is found to be appropriate for constructing SBC. A directional coupler and a 4 X 4 star coupler are constructed as examples.
Chun Yang, Chun Yang,
"Polymer optical fiber coupler for optical interconnection", Proc. SPIE 4906, Optical Components and Transmission Systems, (23 August 2002); doi: 10.1117/12.480541; https://doi.org/10.1117/12.480541