Polarization Challenges in 40 100G Network Upgrades скачать в хорошем качестве

Polarization Challenges in 40 100G Network Upgrades

Tackling Polarization Mode Dispersion (PMD) has been considered a key challenge when moving on to today´s bit rates such as 40Gbit/s or 100Gbit/s. While PMD compensation seems to be unavoidable for RZ/NRZ transmission, new modulation formats such as QPSK/DQPSK promise to provide inherently higher PMD tolerance. In particular complex receiver schemes incorporating adaptive hardware need to prove their tolerance against various (dynamic) impairments. We will describe how Agilent´s electro-optic polarization synthesizers (e.g. the N7786B) as well as high-speed polarization analyzers (N7781B) can help to address these problems. Also, we will give some insight in latest activities addressing topics such as analyzing life traffic with respect to PMD (¨In-Situ PMD-measurement¨) or dynamic emulation of PMD for PMD-Tolerance-Testing.