Christoph Glingener

Reduced model to describe SPM-limited fiber transmission in dispersion-managed lightwave systems

A reduced model to describe self-phase modulation (SPM)-limited fiber transmission in dispersion-managed lightwave systems is presented. By introducing a new figure of merit, the maximum transmission distance versus optical power can be determined without any numerical simulation. Together with simplified models for other nonlinear fiber effects, a useful set of design rules for a first-order performance estimation of wavelength-division multiplexed (WDM) systems is established.

Measurement of the dispersion tolerance of optical duobinary with an MLSE-receiver at 10.7 Gb/s

We experimentally demonstrate a significant improvement in the dispersion tolerance of optical duobinary modulation when employing an MLSE instead of a standard receiver. We show that the improvement critically depends on the MLSE design.

Impact of nonlinear pump interactions on broadband distributed Raman amplification

Broadband distributed Raman amplification is helpful in multi-terabit transmission experiments requiring high and flat gains over a wide spectral window. We show that nonlinear pump interactions can severely degrade amplifier performance at high pump powers.

An adaptive optical equalizer concept for single channel distortion compensation

We present a new adaptive optical equalizer concept for single-channel distortion compensation and analyze the performance of an adaptive optical FIR-filter in lattice structure (cascaded MZI) with respect to equalization of residual dispersion, self-phase modulation and polarization-mode dispersion.

Influence of the dispersion map on limitations due to cross-phase modulation in WDM multispan transmission systems

We determine system limitations due to cross-phase modulation (XPM) for non-zero dispersion shifted fiber by experiments and simulations. For the worst case of full dispersion compensation in each span we find a maximum power law whereas for appropriate undercompensation XPM can be efficiently suppressed.

SRS crosstalk in preemphasized WDM systems

With a new simple model for stimulated Raman scattering crosstalk and an 30 dBm system experiment we found that the shortest and longest wavelength channels are affected most by SRS crosstalk independent of the preemphasis.

Bandwidth limitations of broadband distributed Raman fiber amplifiers for WDM systems

Pump interactions have been identified as a limiting factor for the gain bandwidth product of broadband distributed Raman fiber amplifiers. With respect to distributed Raman gain, it is more advantageous to add WDM channels at wavelengths above C+L band rather than below.

All-optical-networking at 0.8 Tb/s using reconfigurable optical add/drop multiplexers

We report on the successful operation of a metropolitan DWDM network composed of static and reconfigurable optical add/drop multiplexers. The error-free transmission of 80 channels at 10-Gb/s line rate (0.8 Tb/s aggregate capacity) is demonstrated in a transparent fiber ring of 60-km circumference. The 50-GHz technology is enabled by an optical frequency interleaver, and single wavelength channels are routed dynamically by thermally tunable fiber gratings. This work experimentally demonstrates the concept for the German KOMNET Cityring field-trial, Berlin, Germany.

Polarization mode dispersion compensation at 20 Gb/s with a compact distributed equalizer in LiNbO/sub 3/

PMD of existing fibers impairs transmission at rates greater than 10 Gb/s. We present a 43 ps PMD compensator in X-cut, /spl gamma/-propagation LiNbO/sub 3/ with cascaded TE-TM converters and demonstrate successful operation at 20 Gb/s.

System impact of ripples in grating group delay

We present simple analytical expressions which relate fiber grating group-delay ripples to system performance and allow the estimation of expected penalties. Experiments show excellent agreement with our theory. A WDM transmission experiment shows that the system performance can be drastically improved if the channels are slightly detuned in wavelength.