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首页> 外文会议>International Conference on Optics and Photonics 2015 >Tunable differential polarization phase shifter using electro-optic property of trapezoidal lithium niobate crystal
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Tunable differential polarization phase shifter using electro-optic property of trapezoidal lithium niobate crystal

机译：利用梯形铌酸锂晶体的电光特性可调谐的差分偏振移相器

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摘要

A mathematical model to study the phase difference introduced between the two orthogonal components of light wave due to electro-optic effect in a trapezoidal shaped lithium niobate single crystal has been made. Here, the electrodes are placed on the two opposite non-parallel faces such that the field is nearly perpendicular to the light beam direction. It is found that for the said geometry of the device structure, the maximum phase difference is a function of oblique angle between the two non-parallel faces, which has a critical value. Using random optimization technique based on genetic algorithm, the device parameters can be optimized for any required phase change between the two components of light wave. The phase difference between the two orthogonal components of light can be made tunable by using a multi-strip electrode structure. The advantage of this technique is that tunability can be obtained with a constant voltage source.
机译：建立了数学模型，研究梯形铌酸锂单晶中由于电光效应而在光波的两个正交分量之间引入的相位差。在此，将电极放置在两个相对的非平行面上，以使场几乎垂直于光束方向。已经发现，对于所述器件结构的几何形状，最大相位差是两个非平行面之间的倾斜角的函数，该倾斜角具有临界值。使用基于遗传算法的随机优化技术，可以针对光波两个分量之间的任何所需相变来优化设备参数。通过使用多条电极结构，可以使光的两个正交分量之间的相位差可调。该技术的优点是可以使用恒定电压源获得可调性。

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