Preparation methods and their development of graded-index polymer optical fibers

The development of digital video frequency signals etc . places a strict requirement to the transmission media, so the graded-index polymer optical fibers (GI-POFs) with a wide bandwidth have been a research topic in the world.Three ways for preparing GI-POFs,which great efforts have been put on for the ten years,are introduced in details and merits and demerits of each one are also analyzed. The interfacial-gel polymerization technique is a mature one and the existing shortcomings are not to be breached easily because they are natural-born.The co-extrusion process is fit for the large-scale production and that has acquired great progress lately, which has a wide foreground of industrialization. The copolymerization in a centrifugal field can only be used limitedly and its foreground maybe unclear.lt is expected that the co-extrusion process is likely to be a main way of preparing GI-POFs.