B. Landousies

All-optical regeneration

Different optical signal regeneration techniques are reviewed. Fibre or semiconductor based devices are addressed and compared, and 2R or 3R schemes are discussed. We briefly review 2R (reshaping repeater) and 3R (retiming reshaping repeater) optical regeneration schemes, based on different technologies which could be promising for high speed optical signal processing, and also try to compare these new optical approaches with well known optoelectronic schemes.

Investigation into optical technologies for access evolution

This paper considers the main technical challenges for optical access network deployment. Technological evolution of broadband optical networks is discussed with the need for adapting both metropolitan and access networks to the customer services demand evolution.

Theoretical study of the gain equalization of a stabilized gain EDFA for WDM applications

We present a simple and efficient model which takes gain stabilization and internal filtering for gain equalization into account. This model allowed the optimization of the filter position in the doped fiber to obtain the best gain stabilization and lowest noise figure. Finally, we demonstrate that equalized and stabilized gain amplifiers are efficient devices for wavelength division multiplexing (WDM) transmissions.

First Demonstration of Coexistence of Standard Gigabit TDM-PON and Code Division Multiplexed PON Architectures Toward Next Generation Access Network

World-first coexistence trial of TDM and CDM giga-bit passive optical networks (PONs) was successfully completed. A very shallow minimum isolation of 7 dB between G- and CDM-PON at OLT and ONU in the ITU-T G.984.5 enhancement band was demonstrated. The feasibility of bidirectional transmission on the same wavelength was confirmed. The backscattering optical noise does not seriously affect the maximum reach of CDM-PON. Adding the CDM-PON onto GPON can provide following technical and economical impacts: low-cost coexistence, minimum service outage, and combination of best-effort and guaranteed-bandwidth for efficient and high-quality network services due to CDM feature.

Optical access evolutions and their impact on the metropolitan and home networks

This paper describes broadband optical access networks evolutions including high speed home interfaces for fixed and mobile services. Technical challenges are also discussed, namely concerning optical extended budget, 10 Gbit/s interfaces as well as the impact of access evolutions on the metropolitan network.

Enhanced optical budget system performance of an burst extended PON at 10.7Gbit/s over 60km of fibre

A 10.7 Gbit/s upstream extended PON was demonstrated over 60 km of fibre in burst configuration. A budget of 39.5 and 55 dB was achieved without and with SOA respectively.

Main results of the ACTS OPEN France-Belgium field trial

Results of the ACTS OPEN France-Belgium are reported. Wavelength-division multiplexing transmission and routing performance has been investigated. Especially, bit-error-rate measurements out in various network configurations.

Investigation of 2R optical regeneration in a 2.5 Gbit/s WDM trunk network topology

We experimentally show that an all-optical 2R regeneration scheme could allow error-free operation at 2.5 Gbit/s over at least 1750 km, in a typical European network topology featuring regeneration spans of 450 km uncompensated standard fiber sections.

10Gbit/s TDM Passive Optical Network in Burst Mode Configuration using a Continuous Block Receiver

A 10 Gbit/s PON based on TDM was demonstrated using a continuous block receiver in the ONU. 50 km fibre was implemented and a maximum budget of 22 dB was achieved. A dynamic range of 16.5 dB was obtained.

Class B+ GPON extended to 44dB while maintaining 15dB optical budget difference

Optical amplifiers are evaluated as extender boxes for GPON ClassB+ systems. We obtained a total budget of 44dB from OLT to ONUs while maintaining 15dB optical budget difference between ONUs.