Massimo Manna

First dispersion-flattened transpacific undersea system: from design to terabit/s field trial

The 8991-km-long transpacific segment of the Tyco Global Network (TGN) [TGN is a trademark of Tyco Telecommunications, Eatontown, NJ 07724 USA], connecting Hillsboro, Oregon, USA to Toyohashi, Japan, is the first installed dispersion-flattened dense wavelength division multiplexed (DWDM) system. In this paper, we describe the development path bringing this system from the computer design stage to a field trial, which confirms that the installed segment can support the design capacity of 96/spl times/10 Gb/s customer channels per fiber pair. Commercial channels have been provisioned on this segment with satisfactory system margins. Exploratory transmission results at 128/spl times/12.3 Gb/s over this segment are also reported here. The experimental results agree well with our expectations based on the results from our system design simulator.

Terabit/s field trial over the first installed dispersion-flattened transpacific system

We present results of a successful field trial at 96 /spl times/ 12.3 Gb/s per fiber over the first installed dispersion-flattened transpacific system, 8991-km long, part of the Tyco Global Network/sup /spl trade//, plus experimental results for 128 /spl times/ 12.3 Gb/s over the same path.

Spectral hole burning simulation and experimental verification in long-haul WDM systems

The effect of spectral hole burning on long-haul WDM systems was simulated and measured on installed transatlantic link. Changes in end-to-end system gain versus number and wavelength of channels were evaluated. Modeling results are in good agreement with experimental data.

FWM resonances in dispersion slope-matched and nonzero-dispersion fiber maps

We show that four-wave mixing (FWM) resonances can affect performance of selected channels within the dense wavelength-division-multiplexing band. The FWM resonances may cause a Q-factor penalty in excess of 1 dB. We develop an analytical model to predict the spectral location and the intensity of the resonances. Dispersion slope-matched maps and manufacturing variations help to suppress the resonances.

Impact of spectral hole burning on initial loading scenarios in DWDM submarine cable systems

Submarine DWDM cable systems are designed for very high capacities at full loading, but initial loading could consist of few channels. We present a channel loading scheme that suppresses spectral hole burning impact in broadband systems. Such loading can be accomplished with few loading tones and allows for effective in-service upgrades.

An experimental analysis of performance fluctuations in high-capacity repeaterless WDM Systems

We present an investigation of performance fluctuations in high-capacity repeaterless WDM systems. In a 32/spl times/12.3 Gb/s 410 km transmission experiment, nonlinear channel cross-talk causes > 1.5 dB Q-factor fluctuation. System design must include sufficient margin for these fluctuations.

Increasing maximum capacity on installed submarine cable systems with RZ-DPSK transceivers

The capabilities of legacy submarine systems are significantly enhanced using RZ-DPSK transceivers. Single channel systems are upgraded to WDM, capacity of WDM systems is significantly increased, and distance is extended through concatenation of existing segments.