D. Watley

Single channel 160 GB/s OTDM propagation over 480 km of standard fiber using a 40 GHz semiconductor mode-locked laser pulse source

We have successfully demonstrated the propagation of 160 GB/s over 480 km of NDSF using a 40 GHz semiconductor mode locked laser (MLL) as a pulse source and a two stage, dual drive, electroabsorption modulator (EAM) based optical time domain demultiplexer (OTDD). Theoretical predictions show that the reach can be significantly extended by using distributed Raman amplification, and that the WDM penalties due to nonlinear effects are negligible.

Field evaluation of an optical PMD compensator using an installed 10 Gbit/s system

We report, for the first time, results correlating PMD compensation performance to system instantaneous differential group delay (DGD) over installed fibre. We also report accurate replication of the installed fibre PMD conditions in a laboratory providing accelerated PMD exploration.

Polarisation-channel-interleaved carrier-suppressed RZ ETDM/DWDM transmission at 40 Gbit/s with 0.8 bit/s/Hz spectral efficiency

We report experimental results of 8/spl times/40 Gbit/s polarization-channel-interleaved carrier-suppressed RZ transmission over 2/spl times/160 km NDSF, with 0.8 bit/s/Hz spectral efficiency. Average system linear Q of 6.5 (2/sup 31/-1 PRBS) and tolerance of at least 50% degradation in orthogonality were demonstrated.

16-channel 40 Gb/s carrier-suppressed RZ ETDM/DWDM transmission over 720 km NDSF without polarisation channel interleaving

We report experimental and simulation results on transmission. and simultaneous dispersion-compensation of 16/spl times/40 Gb/s carrier-suppressed RZ ETDM signals with 0.4 bit/s/Hz spectral-efficiency over 6/spl times/120 km NDSF. Q-factors between 16.3 and 17.7 dB were achieved at 2/sup 31/-1 pattern length without FEC or polarisation interleaving.

Impact of higher-order polarisation mode dispersion on a 10 Gb/s system over installed non-dispersion shifted fibre

We report experimental results demonstrating that the variation in system performance due to second-order polarization-mode-dispersion effects can be decreased through a reduction of the net chirp.

Comparison between an integrated and a discrete transmitter for high line rate OTDM systems

The results obtained here indicate that this Agere device shows very good performance as a short pulse source for OTDM based systems. It has been demonstrated that, thanks to lower operating losses, theoretical noise figures and experimental Q values are significantly better than the values for. standard pulse source comprised of an electroabsorption modulator (EAM) and a LiNbO/sub 3/ modulator. Moreover, its high extinction ratio makes it attractive for OTDM applications. Finally, its stability and compactness make this device a potentially cost effective solution for the future high line rate transmitters.