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    • 1. 发明授权
    • Polarization-independent electro-optically switched directional coupler
    • 极化独立的电光定向耦合器
    • US5495544A
    • 1996-02-27
    • US408211
    • 1995-03-22
    • Terry L. SmithDaniel V. AttanasioJames E. Watson
    • Terry L. SmithDaniel V. AttanasioJames E. Watson
    • G02F1/313G02B6/26G02B6/42
    • G02F1/3132G02F2203/06
    • A polarization-independent electro-optically switched directional coupler utilizing reverse differential propagation constant control comprises an electro-optic material having at least a pair of wave guide channels within an interaction region and at least a pair of electrodes for selectively producing an electric field across the wave guide channels which electro-optically alters an optical propagation constant of the wave guide channels so as to vary the effects of an optical coupling between the wave guide channels. The wave guide channels have a curvature region defined by a constant radius that is selected so as to coincide a set of operating voltages for an optical switch state of the directional coupler for a transverse magnetic (TM) polarization mode with a set of operating voltages for an optical switch state of the directional coupler for a transverse electric (TE) polarization mode by shifting the optical switch state of the TM polarization mode relative to the optical state of the TE polarization mode due to the relative difference between the magnitude of the electro-optic effect for the TM polarization mode light signal in the curvature region and magnitude of the electro-optic effect for the TE polarization mode light signal in the curvature region.
    • 利用反向差分传播常数控制的偏振非依赖电光定向耦合器包括电光材料,其在相互作用区域内具有至少一对波导通道,以及至少一对电极,用于选择性地产生横跨 波导通道,其电光改变波导通道的光传播常数,以便改变波导通道之间的光耦合的影响。 波导通道具有由恒定半径限定的曲率区域,该曲率区域被选择为使得用于横向磁(TM)偏振模式的定向耦合器的光开关状态的一组工作电压与一组工作电压一致 通过相对于TE偏振模式的光学状态移动TM偏振模式的光开关状态,由于电 - 光偏振模的幅度之间的相对差异,横向电(TE)偏振模式的定向耦合器的光开关状态, 光学效应在TM偏振模光信号的曲率区域和电光效应的大小对于TE偏振模光信号在曲率区域。
    • 2. 发明授权
    • System for tuning an integrated optical switch element
    • 用于调谐集成光开关元件的系统
    • US5566263A
    • 1996-10-15
    • US408214
    • 1995-03-22
    • Terry L. SmithDaniel V. AttanasioJames E. WatsonGeorge R. Hare
    • Terry L. SmithDaniel V. AttanasioJames E. WatsonGeorge R. Hare
    • G02F1/313G02F1/01G02B6/35
    • G02F1/0123G02F1/3132G02F1/3136G02F1/3137
    • A system for tuning an integrated optical switch element utilizes a reflection from a light signal that is propagated into a first input port defined on one side of an interaction region of the optical switch element. The reflection occurs beyond an opposite side of the interaction region from the side on which the light signal is introduced. The reflection is detected at a second input port of the optical switch element on the same side of the interaction region as the side on which the light signals is introduced. The reflection is used to tune the optical switch element to a desired switch state by minimizing the reflection detected at the second input port. By minimizing the reflection detected at the second input port for a desired switch state, the strength of the optical signal through the wave guide channels intended to be used to propagate the light signal in the desired switch state is maximized. As a result, the switching extinction ratio for the optical switch element in the desired switch state is optimized. The system can be used to selectively tune a single optical switch element, or can be used to selectively tune multiple integrated optical switch elements that form an optical switch matrix on a common substrate, for example.
    • 用于调谐集成光开关元件的系统利用来自光信号的反射,该光信号被传播到限定在光开关元件的相互作用区域的一侧上的第一输入端口中。 反射发生在与从其引入光信号的一侧的相互作用区域的相反侧。 在光开关元件的与引入光信号的一侧的相互作用区域的相同侧的第二输入端处检测到反射。 反射用于通过最小化在第二输入端口处检测到的反射来将光学开关元件调谐到期望的开关状态。 通过将在第二输入端口检测到的反射最小化为期望的开关状态,通过旨在用于在期望的开关状态下传播光信号的波导通道的光信号的强度最大化。 结果,优化了所需开关状态下的光开关元件的切换消光比。 该系统可以用于选择性地调谐单个光学开关元件,或者可以用于例如选择性地调谐在公共基板上形成光学开关矩阵的多个集成光学开关元件。