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    • 14. 发明申请
    • OPTICAL MODULATOR
    • 光学调制器
    • US20080025662A1
    • 2008-01-31
    • US11841188
    • 2007-08-20
    • Jungo KondoOsamu MitomiKenji AokiYuichi IwataTetsuya Ejiri
    • Jungo KondoOsamu MitomiKenji AokiYuichi IwataTetsuya Ejiri
    • G02F1/295
    • G02F1/2255G02F1/0123G02F2001/212G02F2201/58G02F2203/20
    • An optical modulator is provided for modulating light propagating in a three-dimensional optical waveguide 5 by applying a voltage thereto. The optical modulator has the three-dimensional optical waveguide 5 including at least one pair of branch optical waveguides 5c and 5d, a multiplexing part 5e of the branch optical waveguides and an emission part 5f provided in the downstream of the multiplexing part, modulation electrodes 3A, 3B and 4 for applying a signal voltage for modulating light propagating in the three-dimensional optical waveguide 5, and guiding waveguides 6A and 6B for guiding primary mode light from the multiplexing part. Thickness of the substrate is 20 μm or less at least under the modulation electrodes, and an operation point of the optical modulator is controlled by changing, based on light output from the guiding waveguides, DC bias applied onto the modulation electrodes.
    • 提供了一种光调制器,用于通过向其施加电压来调制在三维光波导5中传播的光。 光调制器具有三维光波导5,其包括至少一对分支光波导5c和5d,分支光波导的复用部分5e和设置在复用部分的下游的发射部分5f ,用于施加用于调制在三维光波导5中传播的光的信号电压的调制电极3A,3B和4,以及用于引导来自复用部分的初级模式光的导向波导6A和6B。 至少在调制电极下方,基板的厚度为20μm以下,通过根据导向波导的光输出,施加到调制电极上的直流偏压来改变光调制器的操作点。