Comparison of Ultra-Low-Loss G.652B Fiber and G.652D Fiber Sensing Links with Second-Order Raman forward Pumping

How to extend the repeaterless transmission/sensing distance is the main demand for power grid as higher requirements are proposed for the optical transmission/sensing system. Although many technologies have been proposed to extend the working distance, most of previous works used G.652D fiber. In this paper, the performance differences between ultra-low-loss G.652B fiber and G.652D fiber sensing links with second-order Raman forward pumping are numerically compared, all with 150km length. The results show that the transmission distance of the signal light could be longer in ultra-low-loss G.652B fiber than G.652D fiber and better optical signal-to-noise ratio will be obtained in ultra-low-loss G.652B fiber since the amplified signal light power distribution is more uniform. It could conclude that ultra-low-loss G.652B fiber provides better C-band signal amplification and transmission.