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Definition of "microchannel-plate spatial light modulator (MSLM)" |
an optically addressed spatial light modulator. When input light is incident onto a photocathode on the writein side of the MSLM, a photoelectron image is formed, which is multiplied to about hundred thousand times by the microchannel plate. The resulting charge pattern will in turn affect the second layer, which is the LiNbO3 crystal plate having electro-optic effect. The refractive index of the crystal plate is now modulated by the electric charge pattern. When output light passes through the crystal plate, the phase of output light is modulated by the varying refractive index of the crystal plate. Since the LiNbO3 is birefringence, phase modulation becomes polarization modulation. Polarization modulation is visualized as intensity variation using a polarizer. The generation of electric charge and its effect to the crystal layer are nonlinear. Their combined effect has thresholding capability that can be utilized for constructing optical logic gates. |
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