Gustav Veith

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.

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.

10-Gb/s transmission and beyond

The authors outline obstacles encountered in the development of 10-Gb/s (STM-64, OC-192) systems. Technologies to overcome these obstacles are presented and compared, taking into account real field environments. A perspective on 40-Gb/s systems technologies is also given. >

Advanced 160 Gbit/s OTDM system based on wavelength transparent 4 /spl times/ 40 Gbit/s ETDM transmitters and receivers

We have demonstrated an advanced 160 Gbit/s OTDM transmission system with a wavelength transparent transmitter concept suitable for DWDM operation. Latest 40 Gbit/s ETDM technology is used for the first time both in the 160 Gbit/s transmitter and receiver along with PLL clock recovery. 160 Gbit/s OTDM transmission has been demonstrated over 2 /spl times/ 100 km of TeraLight/spl trade/ fibre without an error floor. The experiments clearly show that long TeraLight/spl trade/ fibre spans can be bridged without the need for Raman-amplification.

Adaptive Electronic Feed-Forward Equaliser and Decision Feedback Equaliser for the Mitigation of Chromatic Dispersion and PMD in 43 Gbit/s Optical Transmission Systems

An automatically adapted 43Gbit/s receiver comprising a 5-tap feed-forward and a novel 1-tap decision-feedback equaliser (FFE/DFE) has been applied to mitigate chromatic dispersion and PMD. The 43Gbit/s system tolerance enhancement obtained by FFE/DFE is evaluated.

Challenges for 100 Gbit/s ETDM Transmission and Implementation

This paper reviews the current status in ultra-high speed electronics and optoelectronic components and reports on the recent progress in serial ETDM transmission technologies at channel- bitrates of 85...107 Gbit/s. The challenges associated with 100 Gbit/s ETDM transmission and subsystems implementation are addressed.

40 Gbit/s TDM field test over 111 km installed G.652 fiber

We report on a first 40 Gbit/s TDM (4/spl times/10 Gbit/s OTDM) field fiber transmission test performed over 111 km of standard single mode fiber (G.652) installed in the Stuttgart area. Nearly penalty free transmission (<1 dB vs. back-to-back) was achieved for a bit-error-ratio of BER<1/spl times/10/sup -11/ (2/sup 23/-1 PRBS). A system penalty of 2 dB occurred for a mismatch of dispersion compensation length of 1.0 km (@BER=10/sup -9/). No system degradation due to PMD (mean PMD 0.2 ps//spl radic/km) was observed.

System performance of a nonlinear optical loop mirror used as demultiplexer for bit rates of 40 Gbit/s and beyond

Nonlinear optical fiber loop mirrors (NOLM) are attractive devices for multiplexing optical signals with bitrates of up to 100 Gbit/s and beyond. So far, less attention has been paid to the relation between design of the demultiplexer and the resulting system performance characterized by parameters like input power penalty and wavelength tolerance. Based on our own measurements of a polarization-independent 40 Gbit/s demultiplexer and in conjunction with a new theoretical approach modeling NOLM transmission and worst-case input power penalty of the demultiplexer, a device capable of 100 Gbit/s operation is analyzed. The survey illustrates the potential and trade-offs of the NOLM concept assuming a limited cw power of the switching wave. E.g., the calculations show that a 14.5 dBm booster EDFA together with a loop fiber length between 1 and 2 km allow low penalty drop rates (< 6 dB worst-case penalty) of the demultiplexed channel between 1.3 and 8.8 Gbit/s. Then 100 Gbit/s operation should be possible within a wavelength range of at least 5 nm.

Serial 107Gbit/s ETDM NRZ Transmission over 320km SSMF

We report on a complete serial 107 Gbit/s ETDM NRZ transmission system and assess system performance in an error free transmission experiment over 320 km SSMF with 3.5 dB OSNR margin.

Tolerance Analysis of 107 Gbit/s ETDM ASK-NRZ VSB

We report on the tolerances of a 107 Gbit/s ETDM ASK-NRZ VSB DWDM transmission system with respect to laser detuning, receiver filter detuning, DGD, residual chromatic dispersion and nonlinear transmission impairments.