Noise Reduction Effect in GI POFs

Reflection noise degrades the transmitted signal through laser intensity fluctuations due to optical feedback from some interfaces such as the fiber end faces and the photodiode (PD) [41 -43]. This can be eliminated by using optical isolators and optical fibers with obliquely polished end faces. However, they cannot be applied to in-home and in-building networks because of their high installation cost. 

Here we demonstrate that the reflection noise can be significantly reduced in RoF systems by using GI POFs with a microscopic heterogeneous core. 

Glass MMF (obliquely polished far-end face) Gl POF (flat-polished far-end face) 

Keiser, G. (2010) Optical Fiber Communications, Wiley Encyclopedia of Telecommunications, John Wiley  

and Wagner, R. (1986) Phenomenological approach to polarisation dispersion in long single-mode fibres. Electron. Lett., 22, 1029-1030. 

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