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    • 7. 发明授权
    • Hybrid digital electro-optic switch
    • 混合数字电光开关
    • US5970186A
    • 1999-10-19
    • US816124
    • 1997-03-11
    • John T. KenneyRichard D. Sherman
    • John T. KenneyRichard D. Sherman
    • G02F1/313G02B6/26
    • G02F1/3132
    • A hybrid digital electro-optic switch has core and/or cladding areas that contain at least two different materials which undergo a change in their refractive index when an electric field is applied. One of the two different materials used in core regions, for example, has a change in refractive index that is less than the change in refractive index for the other material when the materials are exposed to the same electric field. A hybrid digital electro-optic switch functions by modulating the propagation constants of the eigenmodes of the switch with a voltage-induced refractive-index change, so that the propagation constants of the two materials are equal either in the presence or absence of the electric field. These electro-optic modulations change the evanescent coupling between the waveguides of the waveguide regions of the switch and transfer an optical signal that was input into one of the waveguides to a coupled waveguide. Compared to earlier digital electro-optic switch designs, the new switch has lower switching voltage, smaller device size, a sharper optical signal transfer, and wider manufacturing and use tolerances, and the switch can use a wide array of materials in its construction. The new switch can also be integrated with both the microstrip and coplanar traveling wave electrodes for very high speed photonic switching applications.
    • 混合数字电光开关具有包含至少两种不同材料的芯和/或包层区域,当施加电场时,它们的折射率发生变化。 例如,在芯区域中使用的两种不同材料中的一种,当材料暴露于相同的电场时,折射率的变化小于其它材料的折射率变化。 混合数字电光开关通过用电压引起的折射率变化来调制开关的本征模的传播常数来实现,使得两种材料的传播常数在存在或不存在电场时相等 。 这些电光调制改变了开关的波导区域的波导之间的消逝耦合,并将输入到波导中的一个的光信号传送到耦合波导。 与先前的数字电光开关设计相比,新开关具有较低的开关电压,更小的器件尺寸,更清晰的光信号传输,更宽的制造和使用公差,并且开关可以在其结构中使用各种各样的材料。 新开关也可以与微带线和共面行波电极集成,用于非常高速的光子开关应用。