S. Gauchard

Experimental investigation of stimulated Raman scattering limitation on WDM transmission over various types of fiber infrastructures

We measure the impact of stimulated Raman scattering on the power distribution of a 32-channel multiplex after 100-km transmission over various fiber types. The Raman gain coefficient is then estimated in each configuration.

10 x 10 Gb/s cross-phase modulation suppressor for multispan transmissions using WDM narrow-band fiber Bragg gratings

We present a 10/spl times/10-Gb/s cross-phase modulation suppressor based on series of WDM narrow-band fiber Bragg gratings. Its effectiveness is demonstrated in a 5/spl times/100-km transmission over nonzero dispersion-shifted fiber. When the device is inserted within the repeaters of the link, the observed bit-error-rate floor due to cross-phase modulation disappears, and a low penalty is obtained over a large range of residual dispersions, allowing the transmission of a larger number of channels over longer distances.

Experimental investigation of dispersion management for an 8/spl times/10 Gbit/s WDM transmission over non-zero dispersion shifted fiber

We experimentally demonstrate that an 8/spl times/10 Gbit/s wavelength-division multiplexing (WDM) transmission with 200-GHz channel spacing over nonzero-dispersion-shifted fiber requires dispersion management when using field channel powers. This is then investigated and optimized.

1111 km, two channel IM-DD transmission experiment at 2.5 Gb/s through 21 in-line erbium-doped fiber amplifiers

Two-channel transmission is demonstrated in a 2.5 Gb/s intensity-modulated direct-detection system over a distance of 1111 km, using 21 in-line erbium-doped fiber amplifiers. The two channels incur virtually no penalty when they are transmitted simultaneously. Owing to the use of gain filtering in the amplifiers instead of discrete in-line optical filters, the overall bandwidth of the link is about 15 nm, for a sensitivity penalty smaller than 1 dB on one single transmitted channel.<<ETX>>

279 km, 591 Mb/s direct detection transmission experiment using four in-line semiconductor optical amplifiers

The authors realized a direct detection intensity-modulation system experiment with four cascaded in-line semiconductor optical amplifiers. Using optical isolators between the amplifiers, they transmitted a NRZ 2/sup 23/-1 message over a distance of 279 km at a bit rate of 591.2 Mb/s. A comparison of this result with parallel experiments without optical isolators indicates that for a realistic implementation of long distance systems with semiconductor optical amplifiers, interamplifier optical isolators will be needed unless the residual facet reflectivity of the optical amplifiers is brought to a very low value (<1*10/sup -4/).<<ETX>>

4-channel, 10-Gbit/s capacity self-healing WDM ring network with wavelength add/drop multiplexers

With wavelength-division multiplexed (WDM) terrestrial links currently being proposed commercially it is reasonable to expect that these systems will evolve to include networking functions. Already, several wavelength add/drop multiplexers (WADM) have been investigated. A novel, nonsynchronous N-channel W-ADM architecture, with full connectivity capability, is investigated.

10/spl times/10 Gb/s cross-phase modulation suppressor using WDM narrowband fiber Bragg gratings

We propose and demonstrate a 10/spl times/10 Gb/s cross-phase modulation suppressor based on series of WDM narrowband fiber Bragg gratings. When inserted 10/sup -7/ error floors are turned into a low 1 dB penalty after transmission over 5/spl times/100 km NZDSF.