A.V. Tran

Extended-reach gigabit passive optical network for rural areas using distributed Raman amplifiers

A new extended-reach GPON for rural areas using distributed Raman amplifiers is proposed and demonstrated. Symmetric 2.5-Gb/s bidirectional transmission is achieved for 32 subscribers over 60-km reach, without using any active extender.

Label swapping for DPSK encoded labels without wavelength conversion

We demonstrate label swapping for DPSK encoded labels using synchronous phase modulation (SPM). For the first time label erasure and insertion is performed in a single step without a need for wavelength conversion.

Economic Analysis of Broadband Access for Australian Rural and Remote Areas

We model and compare the deployment costs of three broadband access technologies, namely digital subscriber loops (DSL), passive optical networks (PON), and WiMAX wireless access, in Australian rural and remote areas. The analysis shows that wireless technologies are cheapest for a 20 Mbit/s rate when the number of homes per square kilometer is less than one. For 50+ Mbit/s, passive optical networks are the most economic.

Does optical burst switching have a role in the core network

We show that optical burst switching (OBS) does not appear to be a viable option for routing in the core network. In order to achieve an acceptably low blocking probability, OBS networks require an uneconomically large increase in network transmission capacity.

Compact optical add-drop multiplexers with low homodyne crosstalk using a single optical circulator and fiber Bragg gratings

We propose and demonstrate new optical add/drop multiplexer (OADM) architectures with simple and compact configuration and excellent crosstalk performance. The OADMs use a single optical circulator and either one or two narrowband fiber Bragg gratings.

Long-reach passive optical networks for rural and remote areas

We report long-reach PON systems utilizing distributed Raman amplification for rural and remote areas. Symmetric 2.5-Gb/s bidirectional transmission is achieved over 60-km reach. We also discuss the practical deployment issues and economics of long-reach PON.

Enabling passive interfaces for integrated optical and wireless access networks

We propose passive interfaces for integrated optical-wireless access networks incorporating optical-tandem-single-sideband (OTSSB) modulation scheme. The performance of the interfaces is evaluated experimentally with OTSSB and VCSEL for simultaneous transport of wired and wireless signals.

Extended reach gigabit passive optical networks for rural areas using Raman and semiconductor optical amplifiers

We demonstrate a new extended-reach GPON for rural areas using distributed Raman amplification and an SOA. Symmetric 2.5-Gb/s bidirectional transmission is achieved for 32 subscribers over 60-km reach, without using an active extender.

Broadband rural access using extended-reach passive optical networks in a dual-fibre architecture

In summary, we have proposed and demonstrated the feasibility of a 60-km extendedreach PON system for broadband access in rural areas using a dual-fibre architecture. In the proposed system, each subscriber is serviced by two fibres with symmetric upstream and downstream traffic at a data rate up to 2.5 Gb/s at 1550 nm. The proposed scheme uses purely passive components in the filed, while providing a sufficient bandwidth for demanding multimedia services. The use of high-end transceivers (equivalent to GPON class-C standard) enables our proposed system to provide broadband access to 99% of the population in rural areas without signal re-amplification. The ease of implementation of EDFAs at the central office allows simple system upgrade for future network expansion.

PON architecture providing local customer networking capability

This paper demonstrates a new PON architecture, which can provide local customer networking capability. The new system offers high utilization of upstream and downstream bandwidth by completely separating the local optical networking from the PON system. The demonstration shows that the local networking functionality has insignificant penalty on the performance of the overall PON system.