J.-P. Thiery

Fast eye monitor for 10 Gbit/s and its application for optical PMD compensation

The excellent correlation between high speed eye monitor signal and BER shows the potential for fast tracking of eye fluctuations and performance monitoring. PMD compensation experiments at 10 Gbit/s demonstrate the performance of a fast eye monitor used as feedback signal.

Demonstration of adaptive PMD compensation at 40 Gb/s

We report for the first time the full experimental assessment of an adaptive PMD compensator at 40 Gb/s over realistic PMD statistics. Results, consolidated by numerical simulations, show that the PMD limit is raised from 4 to 8 ps with the compensator.

252 km repeaterless 10 Gb/s transmission demonstration

Using a practical erbium-doped fiber postamplifier, a dual-stage optical preamplifier, a lithium niobate Mach-Zehnder external modulator and a dispersion-shifted line fiber, IM/DD repeaterless transmission over 252 km at 10 Gb/s with a wavelength-independent receiver sensitivity in the 1530-1565-nm range is achieved. >

Extension of polarization-mode dispersion limit using optical mitigation and phase-shaped binary transmission

The admitted polarization-mode dispersion (PMD) limit is around 15% of the bit-time. With our first-order PMD mitigator, this limit is multiplied by 2 for a non-return to zero signal, and by 3 for a phase-shaped binary transmission signal.

252 km Repeaterless 10 Gbit/s Transmission Demonstration

Using a practical erbium-doped fiber postamplifier, a dual-stage optical preamplifier, a lithium niobate Mach-Zehnder external modulator and a dispersion-shifted line fiber, IM/DD repeaterless transmission over 252 km at 10 Gb/s with a wavelength-independent receiver sensitivity in the 1530-1565-nm range is achieved.<<ETX>>

Experimental statistical assessment of XPM impact on optical PMD compensator efficiency

In this paper, we report experiments on the statistical assessment of the reduction of PMD mitigator efficiency in presence of XPM effects. The XPM-induced depolarization limits compensation in polarization dispersive ultra-long haul system at 10 Gb/s.

A simple formula for the degree of polarization degraded by XPM and its experimental validation

We derive a closed-form expression for the DOP of polarized signals affected by XPM, in a modulated pump-probe scheme. Results are checked against simulations and experiments on a dispersion managed 3 /spl times/100 km link.

Impact of chirping on polarization-mode dispersion compensated systems

Investigates the effect of chirp, resulting from either the transmitter, chromatic dispersion, or Kerr effect in the fiber, on polarization-mode dispersion (PMD) compensated systems. We demonstrate both experimentally and numerically the deleterious impact of chirping on systems with first-order PMD compensation. We present a way to optimize the PMD compensator performance by minimizing the total chirp of the signal at the receiver side.

Penalties induced by higher-order PMD at 10 Gbit/s in nondispersion-shifted fibers

In a recently published work see, Electron. Lett., vol.31, p.1597, 1995; we have demonstrated theoretically that in nondispersion-shifted fibers, second-order polarization-mode dispersion (PMD) can severely compound the PMD penalty as a result of first-order PMD [i.e., the value of the differential group delay (DGD) at the signal central frequency]. To verify these theoretical results, a l0-Gbit/s nonreturn to zero (NRZ) transmission was set up over a 70 km nondispersion-shifted fiber with a chromatic dispersion near 1550 nm. The l0-Gbit/s transmitter consisted of a modulated DFB laser.

Improvement of first-order optical PMD compensator by relevant control of input state of polarization

A new scheme of compensation combining first-order compensation and relevant ISOP control was proposed. Its interest lies in the fact that it avoids staying a long time on sub-optimum, yielding poor performance of the compensator. It has proved to be a good and a simple means to improve the value of tolerable polarisation mode dispersion (PMD) in the line up to 37% of bit-time.