DSP-free single-wavelength 100 Gbps SDM-PON with increased splitting ratio using 10G-class DML.

Fangdi Bao,Md Nooruzzaman,Yunhong Ding,Leif K Oxenløwe,Hao Hu,Toshio Morioka,Yoshimichi Amma,Yusuke Sasaki

doi:10.1364/oe.27.033915

Abstract

We present beyond 100 Gbps space-division multiplexing passive optical network (SDM-PON) systems using commercial 10G-class directly modulated laser (DML) modulated with 25/28 Gbps data signals, with polarization-diversity micro-ring resonator (PD-MRR) to improve the extinction ratio (ER). A high-count multi-core fiber (HC-MCF) with low-crosstalk (XT) is used in the system, simultaneously increasing the transmission capacity and splitting ratio. Different cores of the HC-MCF are used for upstream (US) and downstream (DS) transmission, avoiding the Rayleigh backscattering noise. Thanks to compatibility with time-division multiplexing (TDM), the splitting ratio could be further increased. In addition, both symmetric and asymmetric SDM-PON architectures are proposed to meet different requirements of users. In the SDM-PON systems, a simple intensity modulation/ directly detection (IM/DD) is applied without digital signal processing (DSP), which may be a promising candidate for future large-capacity and high splitting ratio access networks.

Highlights

To meet ever-increasing bandwidth demands in access networks, for emerging services, such as cloud computing, 4K or 8K TV, virtual reality and mobile X-haul for the 5G, high-speed passive optical networks (PONs) have attracted a lot of research interest
We present beyond 100 Gbps space-division multiplexing passive optical network (SDM-PON) systems using commercial 10G-class directly modulated laser (DML) modulated with 25/28 Gbps data signals, with polarization-diversity micro-ring resonator (PD-MRR) to improve the extinction ratio (ER)
We propose, for the first time, a Space-division multiplexing (SDM)-PON scheme based on a high-count multi-core fiber (HC-multi-core fibers (MCFs)) achieving a high splitting ratio and large transmission capacity at the same time

Summary

Introduction

To meet ever-increasing bandwidth demands in access networks, for emerging services, such as cloud computing, 4K or 8K TV, virtual reality and mobile X-haul for the 5G, high-speed passive optical networks (PONs) have attracted a lot of research interest. SDM as a promising technique using few mode fibers (FMFs) or multi-core fibers (MCFs) in a PON system has been proposed to increase the transmission capacity and splitting ratio [7,8,9,10]. We have demonstrated a 100 Gbps SDM-WDM-PON using a Mach-Zehnder modulator (MZM) based 10 Gbps transmitter [7]. We propose, for the first time, a SDM-PON scheme based on a high-count multi-core fiber (HC-MCF) achieving a high splitting ratio and large transmission capacity at the same time. Instead of using MZM, an off-the-shelf DML modulated with 25/28 Gbps signals is used [14], and the ER is improved by using a polarization-diversity micro-ring resonator (PD-MRR) [15]. Compared with the couplers used in a TDM-PON system, the loss of the SDM fan-in/fan-out devices based on 3D-waveguide in the SDM-PON are independent of the number of spatial channels, which is beneficial for the power budget of the PON system

Proposed symmetric SDM-PON architecture

Experimental setup and results

Conclusions