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    • 8. 发明授权
    • Optical modulator including waveguide grating structure and multiple quantum well layer
    • 光调制器包括波导光栅结构和多量子阱层
    • US07593606B2
    • 2009-09-22
    • US11888032
    • 2007-07-30
    • David FattalMichael M. SigalasShih-Yuan Wang
    • David FattalMichael M. SigalasShih-Yuan Wang
    • G02F1/035
    • G02F1/01708B82Y20/00G02F1/295G02F2201/302
    • An optical modulator and related methods are described. In accordance with one embodiment, the optical modulator comprises a horizontal waveguide grating structure (WGS) receiving an incident radiation beam propagating in a non-horizontal direction. The WGS includes a horizontal waveguiding layer along which a lateral propagation mode is guided, the lateral propagation mode having a vertically extending mode profile. The optical modulator further comprises a multiple quantum well (MQW) layer sufficiently proximal to the horizontal waveguiding layer to be within a vertical extent of the mode profile of the lateral propagation mode. The optical modulator further comprises an electric field source applying a time-varying electric field to the MQW layer. The optical modulator modulates the incident radiation beam according to the time-varying electric field to generate a modulated radiation beam propagating in one of a transmitted direction and a reflected direction.
    • 描述了光学调制器及相关方法。 根据一个实施例,光调制器包括接收沿非水平方向传播的入射辐射束的水平波导光栅结构(WGS)。 WGS包括沿横向传播模式被引导的水平波导层,横向传播模式具有垂直延伸的模式轮廓。 光学调制器还包括一个足够靠近水平波导层的多量子阱(MQW)层,处于横向传播模式的模式分布的垂直范围内。 光调制器还包括向MQW层施加时变电场的电场源。 光调制器根据时变电场调制入射辐射束,以产生在透射方向和反射方向之一上传播的调制辐射束。