We introduce an extremely thin 50/125 perfluorinated graded-index plastic optical fiber (POF) and its application in a 4 × 10 Gb/s optical link including our optical subassembly (OSA). We outline the main characteristics of the POF before the introduction of the fibers to our already established OSA is explained. Particularly low attenuation with error-free transmission down to a bending radius of 1 mm is presented in comparison to a quartz optical fiber. Furthermore eye diagrams of all four channels after 5 m over POF at 10 Gb/s are presented. Bit error rate for all channels is less than 10-12 and remains constant when another channel is being driven simultaneously.
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