Abstract

A Pb1-xLax(ZryTiz)1-x/4O3 (PLZT) electrooptic ceramic variable-rotatable waveplate and a compact inline polarimeter have been used to develop a fast feed-forward-controlled module for the continuous and complete conversion of polarization. This requires the control of only two parameters: the direction ? and strength of the applied voltage V0. Feed-forward control speed is fast, taking only 24 µs . The chip plates were made by cutting T-shaped trenches into the four sides of a 500 × 400 × 300-µm3 PLZT chip and coating the trenches with electrodes. The PLZT waveplate is inserted into a 330-µm gap between thermally expanded core fibers. The input polarization states are monitored by a newly developed compact and fast inline polarimeter,which is placed in front of the polarization controller. The optimum ? and V0 values for the required conversion are calculated by a computer, and the corresponding voltages are then applied to PLZT waveplate.

© 2003 IEEE

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