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Journal of Computer Networks and Communications
Volume 2014, Article ID 483249, 7 pages
Research Article

Wavelength Tuning Free Transceiver Module in OLT Downstream Multicasting  Gb/s TWDM-PON System

1TM R&D Sdn Bhd, Lingkaran Teknokrat Timur, 63000 Cyberjaya, Selangor, Malaysia
2Faculty of Electrical Engineering, Universiti Teknologi Malaysia, Skudai, 81310 Johor Bharu, Johor, Malaysia

Received 27 December 2013; Revised 19 May 2014; Accepted 1 June 2014; Published 26 June 2014

Academic Editor: Achour Mostéfaoui

Copyright © 2014 M. S. Salleh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We propose a new architecture of dynamic time-wavelength division multiplexing-passive optical network (TWDM-PON) system that employs integrated all-optical packet routing (AOPR) module using  Gbps downstream signal to support 20 km fiber transmission. This module has been designed to support high speed L2 aggregation and routing in the physical layer PON system by using multicasting cross-gain modulation (XGM) to route packet from any PON port to multiple PON links. Meanwhile, the fixed wavelength optical line terminal (OLT) transmitter with wavelength tuning free features has been designed to integrate with the semiconductor optical amplifier (SOA) and passive arrayed waveguide grating (AWG). By implementing hybrid multicasting and multiplexing, the system has been able to support a PON system with full flexibility function for managing highly efficient dynamic bandwidth allocation to support the  Gb/s TWDM-PON system used to connect 4 different PON links using fixed wavelength OLT transceivers with maximum 38 dB link loss.