Semiconductor strip active optical device
    2.
    发明授权
    Semiconductor strip active optical device 失效
    半导体带有源光学器件

    公开(公告)号:US5442723A

    公开(公告)日:1995-08-15

    申请号:US297057

    申请日:1994-08-29

    摘要: A guide structure of a strip semiconductor active optical device includes a core structure extending as far as coupling surfaces. It includes at least three high index layers having refractive indices increased relative to that of the surrounding media to increase in these layers the power density of light to be processed, for example amplitude modulated, by the device. The high index layers have compositions such that they can apply this processing in response to electrical excitation and thicknesses greater than those of quantum wells. They are separated by lower refractive index dilutant layers with greater thicknesses such that a single propagation mode of light is guided by the guide structure. This mode has a thickness suited to coupling to an external optical component whilst confining the majority of the power of the light within the thickness of the core structure to favor the processing.

    摘要翻译: 带状半导体有源光学器件的引导结构包括延伸到耦合表面的芯结构。 它包括至少三个具有相对于周围介质的折射率增加的高折射率层,以在这些层中增加待被处理的光的功率密度,例如通过该器件的幅度调制。 高折射率层具有这样的组成,使得它们可以响应于大于量子阱的电激发和厚度来应用该处理。 它们由具有更大厚度的较低折射率稀释剂层分开,使得单一传播模式的光由引导结构引导。 该模式具有适于耦合到外部光学部件的厚度,同时将光的大部分功率限制在芯结构的厚度内以有利于处理。

    Y-branch digital optical switch
    3.
    发明授权
    Y-branch digital optical switch 失效
    Y分支数字光开关

    公开(公告)号:US5461684A

    公开(公告)日:1995-10-24

    申请号:US297029

    申请日:1994-08-29

    摘要: In a digital optical switch an input waveguide and two divergent output waveguides constitute a guide structure. A median gap between the two output waveguides constitutes a guide gap. Electrodes control the refractive indices of the two output waveguides to couple the input waveguide and one or both output waveguides depending on the value of a control signal. The width of the guide gap is increased in input and output transition areas to render the variation of this width more progressive therein. This is achieved by means of a median aperture at the end of the input waveguide and a progressive variation in the inclination of the facing edges of the output waveguides.

    摘要翻译: 在数字光开关中,输入波导和两个发散输出波导构成引导结构。 两个输出波导之间的中间间隙构成引导间隙。 电极控制两个输出波导的折射率,以根据控制信号的值耦合输入波导和一个或两个输出波导。 引导间隙的宽度在输入和输出过渡区域中增加,使得该宽度的变化在其中更加渐进。 这通过在输入波导的端部处的中值孔径和输出波导的相对边缘的倾斜度的逐渐变化来实现。