Noda Takafumi, Koike Yasuhiro
1Faculty of Science and Technology, Keio University,3-14-1 Hiy0oshi, Kohoku-ku, Yokohama 223-8522, Japan.
Opt Express. 2010 Feb 1;18(3):3128-36. doi: 10.1364/OE.18.003128.
We propose a novel method of graded index plastic optical fiber (GI POF) to enhance bandwidth. Recently, it has been reported that perfluorinated GI POF with a double cladding structure had much higher bandwidth than theoretical value. The result of analysis of this fiber indicates that the high-bandwidth property is obtained because higher order modes are attenuated at a core and cladding polymer boundary. In addition, it does not induce large increment of attenuation of lower order modes and bending loss. Then, by adopting the rod-in-tube method, we control differential mode attenuation of PMMA based GI POF, and it is proved that bandwidth of GI POF can be enhanced by utilizing scattering of the core and cladding polymer boundary.
我们提出了一种用于提高带宽的新型渐变折射率塑料光纤（GI POF）方法。最近，有报道称具有双包层结构的全氟渐变折射率塑料光纤具有比理论值高得多的带宽。对这种光纤的分析结果表明，之所以获得高带宽特性，是因为高阶模在纤芯和包层聚合物边界处被衰减。此外，它不会引起低阶模衰减和弯曲损耗的大幅增加。然后，通过采用管中棒法，我们控制了基于聚甲基丙烯酸甲酯的渐变折射率塑料光纤的差分模衰减，并且证明了利用纤芯和包层聚合物边界的散射可以提高渐变折射率塑料光纤的带宽。
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