Roman Dischler

10.2 Tbit/s (256x42.7 Gbit/s PDM/WDM) transmission over 100 km TeraLight/sup TM/ fiber with 1.28 bit/s/Hz spectral efficiency

We demonstrate the transmission of 256 polarization-division and wavelength-division multiplexed channels at 42.7 Gbit/s rate over 100 km of TeraLight/sup TM/ fiber. An overall capacity of 10 Tbit/s is achieved in C and L bands at a record 1.28 bit/s/Hz spectral efficiency.

WDM transmission at 6-Tbit/s capacity over transatlantic distance, using 42.7-Gb/s differential phase-shift keying without pulse carver

We report the transmission of a record 6 Tbit/s capacity over 6120 km distance, involving channels modulated at 42.7-Gb/s bit-rate with differential phase-shift keying (DPSK). The performance is found similar to DPSK with subsequent pulse carving, namely RZ-DPSK.

Transmission of 256 wavelength-division and polarization-division-multiplexed channels at 42.7Gb/s (10.2Tb/s capacity) over 3/spl times/100km of TeraLight/spl trade/ fiber

10.2Tb/s capacity is demonstrated over 3/spl times/100km in C and L bands, using 42.7Gb/s channels. The wavelength allocation was chosen while taking into account narrow optical filtering at the transmitter and receiver ends and second-order Raman pumping is used to improve the signal-to-noise ratio.

Transmission of 125 WDM channels at 42.7 Gbit/s (5 Tbit/s capacity) over 12/spl times/100 km of TeraLight/spl trade/ Ultra fibre

The transmission of 125 ETDM channels at 42.7Gbit/s (5 Tbit/s capacity) is demonstrated over 12/spl times/100 km of the new TeraLight/spl trade/ Ultra fibre. The result is obtained with VSB-like filtering at the receiver end and Raman-assisted erbium amplification over C and L bands.

Optimized sensitivity direct detection O-OFDM with multi level subcarrier modulation

We compared direct-detection optical-OFDM systems with QPSK, QAM 16 and QAM64 subcarrier modulation for increase of bitrate. Reduced sensitivties of 7.1 dB and 14.8 dB have been found while increasing the data rate from 10 to 20 and 30Gb/s.

Advantages of frequency shift keying in 10 Gb/s systems

10.7 Gb/s frequency shift keying (FSK) modulation format applying directly modulated DFB lasers is reported. This low cost FSK approach has been compared with OOK and DPSK format by simulations. The proposed FSK solution has been proven by transmission experiments.

3.2 Tb/s (80 /spl times/ 40 Gb/s) C-band transmission over 3 /spl times/ 100 km with 0.8 bit/s/Hz efficiency

We demonstrate 50 GHz-spaced 80 /spl times/ 40 Gbit/s WDM transmission over 300 km of TeraLight/spl trade/ fibre without polarisation demultiplexing, using the PSBT format. A record capacity of 3.2 Tbit/s is thus achieved over the C-band only, with a spectral efficiency of 0.8 bit/s/Hz.

DWDM and single channel fibre nonlinear thresholds for 43 Gb/s ASK and DPSK formats over various fibre types

We experimentally compared nonlinear-thresholds for single channel and DWDM (0.4 bit/s/Hz) over various fibre types. NZDSFs show generally slightly reduced NLT vs. SMF and only ASK modulated DWDM systems over true wave are penalized versus single channel transmission.

Impairments of bit-to-bit alternate-polarization on non-linear threshold, CD and DGD tolerance of 43 Gb/s ASK and DPSK formats [fibre optic communication]

Applying bit-to-bit alternate-polarization modulation at 43 Gb/s in ASK/DPSK formats, we found experimentally non-linear threshold benefits up to 4 dB with RZ and 2 dB with NRZ, reduction of DGD tolerance up to 3 ps with RZ formats and a dispersion-tolerance of 20% with DPSK-NRZ.