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    • 4. 发明授权
    • Dual polarization electromagnetic switch and modulator
    • 双极化电磁开关和调制器
    • US4157860A
    • 1979-06-12
    • US840594
    • 1977-10-11
    • Enrique A. J. Marcatili
    • Enrique A. J. Marcatili
    • H04B10/00G02B6/12G02F1/03G02F1/05G02F1/313H04B10/02G02B5/14
    • G02F1/3132G02F2201/12G02F2203/06
    • Integrated optics directional coupler modulator/switches are improved by the disclosed configurations for switching optical modes of both polarizations at once. In one configuration a pair of parallel optical waveguides are provided having material presenting first and second wavenumbers .beta. for the TE and TM modes. Two independently tunable control signals are applied to an electrode assembly arranged so that each wavenumber is substantially tunable relative to the other thereby permitting substantially complete switching of both of the modes. In an exemplary embodiment, the material is lithium niobate or lithium tantalate with its c-axis perpendicular to the waveguides and oriented between 15 and 75 degrees, suitably at 45 degrees, to the substrate plane. Pairs and triplets of electrodes are used as appropriate to provide vertical and horizontal electric field components so as to independently tune the waveguide wavenumbers and coupling. The principles are applicable to electromagnetic apparatus in general and a variety of physical fields are alternatively used as appropriate for achieving the dual polarization control.
    • 通过所公开的用于同时切换两种偏振的光学模式的配置来改进集成光学定向耦合器调制器/开关。 在一种配置中,提供了一对平行的光波导,其具有呈TE和TM模式的第一和第二波数β的材料。 两个独立可调谐的控制信号被施加到电极组件,其布置成使得每个波数相对于另一个基本可调,从而允许两种模式的基本上完全切换。 在一个示例性实施例中,材料是铌酸锂或钽酸锂,其c轴垂直于波导并且定向在衬底平面的15至75度之间,适当地在45度。 使用电极的对和三重线来提供垂直和水平的电场分量,以便独立地调谐波导波导和耦合。 这些原理通常适用于电磁设备,并且可以适当地使用各种物理场来实现双极化控制。