FERROELECTRIC LIQUID-CRYSTAL POLARIZATION CONTROL DEVICES WITH A DOUBLE-LAYER CELL STRUCTURE

摘要

We analyzed the polarization-switching characteristics of a ferroelectric liquid-crystal polarization control device using a double-layer cell structure for free-space optical processing and switching systems. We theoretically derived the optimum arrangement of layered cells for 90 degrees polarization switching. The theory shows that the optimum parameter range for the double-layer cell structure is wider than that for a single-layer cell. We verified our theory by measuring the polarization cross talk of experimental polarization control devices. [References: 11]