METHOD FOR POLARIZATON TRANSFORMATION WITHOUT ANY DC VOLTAGE DRIFT, AND A POLARIZATION TRANSFORMER WITHOUT ANY DC VOLTAGE DRIFT

摘要

A polarization transformer/PMD compensator chip (K1)contains a differential TE-TM phase modulator (PH1) atthe start of the chip, which produces TE-TM phasemodulation, by which means the mode converterelectrodes (Eij) can be driven with control voltages(Vij) without any DC component. This reliably preventsDC drift.