Design of L-Band Multiwavelength Laser for TDM/WDM PON Application

Nani Fadzlina Naim,Norsuzila Ya'Acob,Muhammad Amirul Hafiz Mohamed Hashim,Suzi Seroja Sarnin,Latifah Sarah Supian

doi:10.21123/bsj.2021.18.4(suppl.).1365

Abstract

This paper presents on the design of L-Band Multiwavelength laser for Hybrid Time Division Multiplexing/ Wavelength Division Multiplexing (TDM/WDM) Passive Optical Network (PON) application. In this design, an L-band Mulltiwavelength Laser is designed as the downstream signals for TDM/WDM PON. The downstream signals ranging from 1569.865 nm to 1581.973 nm with 100GHz spacing. The multiwavelength laser is designed using OptiSystem software and it is integrated into a TDM/WDM PON that is also designed using OptiSystem simulation software. By adapting multiwavelength fiber laser into a TDM/WDM network, a simple and low-cost downstream signal is proposed. From the simulation design, it is found that the proposed design is suitable to be used in TDM/WDM PON for up to 64 Optical Network Units (ONUs).

Highlights

Passive Optical Network (PON) is becoming more favourable in optical network nowadays
An L-band Mulltiwavelength Laser is designed as the downstream signals for Time Division Multiplexing (TDM)/Wavelength Division Multiplexing (WDM) PON
The multiwavelength laser is designed using OptiSystem software and it is integrated into a TDM/WDM PON that is designed using OptiSystem simulation software

Summary

Introduction

Passive Optical Network (PON) is becoming more favourable in optical network nowadays. Current optical network employs Time Division Multiplexing (TDM) or Wavelength Division Multiplexing (WDM) PON architecture. In WDM, multiwavelength lasers are used as the downstream signal. An array of Distributed Feedback (DFB) Laser is used as the downstream signal in WDM. The 16channel laser with 100GHz wavelength spacing was manufactured using a hybrid method. This device can be used on a wide fiber-to-the-home (FTTH) access network. It contains of four 4-channel semiconductor optical amplifier (SOA) arrays and a silica-based AWG array. The laser activity of 16 channels is shown and the fiber-coupled output power may reach up to 1.8mW while the threshold current is as poor as 22mA. Direct laser modulation at 1.25GHz provides an open eye with an extinction ratio of 5.4dB

Methods

Discussion

Conclusion