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Definition of "polarization logic gate" |
an optical logic gate using polarization modulating devices. Polarization modulating devices include MOSLM (magneto-optic spatial light modulator), LCTV (liquid crystal television), LCLV (liquid crystal light valve), MSLM (microchannel-plate spatial light modulator). These devices are very useful in performing XOR and XNOR operations. The basic operation is as follows. Two devices represent inputs A and B, respectively. When a beam of light passes through the first device, its polarization is rotated according to input A. The beam then passes through the second device resulting that its polarization is either rotated further away or rotated back according to input B. To perform other logic operations, an additional thresholding device is necessary whether it is based on optical addition or multiplication. |
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