  We present a complete optoelectronic unit for polarization visualization,
switching and control. The system is based on an FPGA unit and comprises: an
acquisition unit containing an analog polarimeter and digital-to-analog
converters, an FPGA capable of implementing an optimal algorithm for
three-stage arbitrary polarization tracking, and an electronic driver with
analog-to-digital converters capable of interfacing with Lithium-Niobate-based
Polarization Controllers. The results, determined via simulation of
real-parameter devices, show that fast polarization switch is achievable.
