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    • 4. 发明申请
    • OPTICAL ISOLATOR
    • 光学隔离器
    • US20090003769A1
    • 2009-01-01
    • US12126786
    • 2008-05-23
    • Yasuo FUKAIToshiyuki Okumura
    • Yasuo FUKAIToshiyuki Okumura
    • G02B6/26G02B6/12
    • G02B6/122G02B6/2746G02F1/0147
    • On a surface of an Si layer of a substrate, a plurality of optical waveguides are formed that extend linearly in the Y-axis direction and that are separated from each other by a predetermined spacing in the X-axis direction. These optical waveguides each have a width that monotonously increases in the X-axis direction such that an amount of change of the equivalent refractive index of optical waveguides per unit length is constant in the X-axis direction. In this way, an optical isolator is obtained that can operate for an input light in any state of polarization and that can remove a returned light in any state of polarization without allowing the light to return to an input portion.
    • 在基板的Si层的表面上形成有在X轴方向上以规定的间隔在Y轴方向上呈线状延伸的多个光波导。 这些光波导各自具有在X轴方向上单调增加的宽度,使得每单位长度的光波导的当量折射率的变化量在X轴方向上恒定。 以这种方式,获得可以以任何偏振状态对输入光进行操作的光学隔离器,并且可以在任何偏振状态下去除返回的光,而不允许光返回到输入部分。
    • 5. 发明申请
    • Variable demultiplexer
    • 可变解复用器
    • US20060120665A1
    • 2006-06-08
    • US11292973
    • 2005-12-02
    • Yoshimichi KatoToshiyuki Okumura
    • Yoshimichi KatoToshiyuki Okumura
    • G02B6/28
    • G02B6/1225G02B6/12007G02F1/0147G02F1/313G02F2202/32G02F2203/585
    • A small variable demultiplexer capable of improving yield and stabilizing characteristics can be obtained. The small variable demultiplexer includes an SiO2 layer serving as a base medium, a waveguide array, a heater serving as an external refractive index modulating unit and a heat sink serving as the external refractive index modulating unit. The waveguide array is arranged on the SiO2 layer. The waveguide array is formed of the plurality of Si photonic wire waveguides serving as waveguides. The heater and the heat sink provide a refractive index gradient which is formed in the direction perpendicular to the extension direction of the Si photonic wire waveguide, and is variable depending on the plurality of Si photonic wire waveguides. The Si photonic wire waveguide has a one-dimensional photonic crystal structure in the extension direction of the Si photonic wire waveguide.
    • 可以获得能够提高产量和稳定特性的小型可变解复用器。 小可变解复用器包括用作基底介质的SiO 2层,波导阵列,用作外部折射率调制单元的加热器和用作外部折射率调制单元的散热器。 波导阵列布置在SiO 2层上。 波导阵列由用作波导的多个Si光子线波导形成。 加热器和散热器提供在垂直于Si光子线波导的延伸方向的方向上形成的折射率梯度,并且根据多个Si光子线波导可变。 Si光子线波导在Si光子线波导的延伸方向上具有一维光子晶体结构。