Electro-optic modulation of light propagating near the optic axis with any polarization in uniaxial crystals |
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| Authors: | Zhe Song Liren Liu Yu Zhou De&#x;an Liu Haixia Ren |
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| Institution: | aLiaoning Normal University, College of Physics and Electronic Technology, Dalian 116029, PR China;bShanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, PR China |
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| Abstract: | The electro-optic effect in uniaxial crystals for light propagating near the optic axis with any polarization has been analyzed. The passive and the electrically induced birefringences and the rotation of polarization direction in crystals have been calculated, and the conoscopic interference figures under orthogonal polariscopes for different polarizer directions have been plotted. The extinction areas caused by the rotation of polarization direction in crystals change with the polarizer direction, but the two heads of the induced optical axes do not vary, which are always on the induced principal axis with bigger refractive index. The directions of polariscopes are always extinction, and the ±45° directions with polarizer are always complete transmission. The conoscopic interference figures for LiNbO3 crystals have been demonstrated experimentally by rotating polariscopes directions, which accord with the theoretically calculating plots. |
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| Keywords: | Electro-optic modulation Near optical axis Birefringence Polarization Uniaxial crystals |
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