Phase-Modulated Hybrid High-Speed Internet/WiFi/Pre-5G In-Building Networks Over SMF and PCF With GI-POF/IVLLC Transport

Daiki Fujimoto,Song-En Tsai,Kazuo Kumamoto,Jing-Yan Xie,Hai-Han Lu,Qi-Ping Huang

doi:10.1109/access.2019.2926709

Abstract

To the best of our knowledge, a phase-modulated hybrid high-speed Internet/wireless local area network (WLAN) wireless fidelity (Wi-Fi)/pre-fifth-generation (Pre-5G) in-building network over an integration of single-mode fiber (SMF), phonic crystal fiber (PCF), and graded index-plastic optical fiber (GI-POF)/invisible laser light communication (IVLLC) transmission is feasibly demonstrated for the first time. An effective fiber Bragg grating (FBG)-based phase modulation (PM)-to-intensity modulation (IM) conversion scheme is adopted to replace the sophisticated dispersion-induced PM-to-IM conversion scheme or costly delay interferometer (DI). This proposal is the first one to deliver high-speed Internet, WLAN Wi-Fi, and Pre-5G broadband heterogeneous services so as to bridge fiber backhaul and in-building network. The light is phase-modulated with 4-Gb/s four-level pulse amplitude modulation (PAM4) (high-speed Internet), 24-Mbps/2.4-GHz microwave (MW) (WLAN Wi-Fi), and 5-Gb/s/3.5-GHz 16-quadrature amplitude modulation-orthogonal frequency-division multiplexing (Pre-5G) data signals over 41.44-km fiber link (40-km single-mode fiber +1.44-km photonic crystal fiber) with 30-m GI-POF/IVLLC transmission. Bit error rate, PAM4 eye diagrams, error vector magnitude, and constellation map are examined to perform well to reveal the practicality of constructing a phase-modulated hybrid high-speed Internet/Wi-Fi/Pre-5G in-building network.

Highlights

Following with the evolution of fiber-to-the-home (FTTH) technology, wireless broadband access has attracted considerable attention to connect the last-mile between fiber backhaul and in-building network [1]–[6]
Low interferences are acquired over 41.44 km fiber link (Fig. 4(a)), due to the use of 1.44 km phonic crystal fiber (PCF) to considerably reduce the fiber dispersion induced by 40 km Single-mode fiber (SMF) transport, as well as the use of 2 GHz low-pass filter (LPF), 2.4 GHz band-pass filter (BPF), and 2.8 GHz high-pass filter (HPF) to filter out the interferences due to beatings among these three bands
Modal dispersion is a substantial parameter that worsens the performances of in-building network

Summary

Introduction

Following with the evolution of fiber-to-the-home (FTTH) technology, wireless broadband access has attracted considerable attention to connect the last-mile between fiber backhaul and in-building network [1]–[6]. The increasing demands boost the requirements for high transmission capacity for fiber backhaul and for last-mile in-building network. As the SMF is utilized for in-building network, installation convenience and installation cost are critical concerns should be mitigated. It is to be found that SMF-based optical network is not the best choice for the implementation of in-building network. To mitigate these critical concerns, new in-building network medium or scheme is needed.

Methods

Results

Conclusion