Ultra-low-loss and large-effective-area fiber for 100 Gbit/s and beyond 100 Gbit/s coherent long-haul terrestrial transmission systems

Dong Wang,Hongyan Zhou,Lei Wang,Yunbo Li,Ruichun Wang,Lei Zhang,Jie Luo,Han Li,Jun Wu,Wenyu Zhao,Rui Tang,Dechao Zhang,Xin Zhao,Yang Zhao

doi:10.1038/s41598-019-53381-1

Abstract

Ultra-low-loss and large-effective-area fiber has been successfully applied in transoceanic transmission, which is considered as a promising candidate for 100 Gbit/s and beyond 100 Gbit/s coherent long-haul terrestrial optical networks. Several theoretical and experimental investigations have been reported, including provincial terrestrial field trial. To support long-haul terrestrial application, it is urgent to prove that the ultra-low-loss and large-effective-area fiber after terrestrial deployment can significantly enhance the performance of long-haul transmission over 1000 km compared with the conventional single mode fiber. In this paper, we extended our previous work and summarized design methods for complex terrestrial environment. To verify the fiber characteristics in long-haul terrestrial transmission, we installed the longest terrestrial ultra-low-loss and large-effective-area fiber link in the world with a total length of 1539.6 km. The results show that the transmission performances of wavelength-division-multiplexed signals with per-channel data rates of 100 Gbit/s, 200 Gbit/s, and 400 Gbit/s over the ultra-low-loss and large-effective-area fiber are all obviously improved, demonstrating that this fiber is more suitable for ultrahigh-speed long-haul terrestrial transmission.

Highlights

With the rapid development of advanced services, such as mobile internet, high-definition video, cloud computing, virtual reality, etc., the demand for the capacity of existing 100 Gbit/s coherent optical transport network exhibits a significant increasing trend
For coherent optical transmission system, the transmission performance is mainly limited by the attenuation and nonlinear effects in fiber as the dispersion can be sufficiently compensated by digital coherent detection[8]
The ultra-low-loss and large-effective-area fiber, and the standard single mode fiber are installed in the same cable, which are briefly presented as the G.654.E fiber and the G.652.D fiber, respectively

Summary

Introduction

With the rapid development of advanced services, such as mobile internet, high-definition video, cloud computing, virtual reality, etc., the demand for the capacity of existing 100 Gbit/s coherent optical transport network exhibits a significant increasing trend. The optimum optical power before launching into the fiber link can be increased as the effective area of fiber is enlarged, which is benefit for improving the received OSNR. ITU-T introduced a new sub-category of the ultra-low-loss and large-effective-area fiber subsequently to support 100 Gbit/s and beyond 100 Gbit/s coherent terrestrial transmission, which is named as G.654.E fiber.

Results

Conclusion