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    • 9. 发明申请
    • Highly efficient focusing waveguide grating coupler using leaky mode
    • 使用泄漏模式的高效聚焦波导光栅耦合器
    • US20050008294A1
    • 2005-01-13
    • US10749349
    • 2003-12-31
    • Yongwoo ParkYeungjoon SohnMun-Cheol PaekDong-Woo SuhHojun RyuHyeon-Bong Pyo
    • Yongwoo ParkYeungjoon SohnMun-Cheol PaekDong-Woo SuhHojun RyuHyeon-Bong Pyo
    • G02B6/28G02B6/122G02B6/124G02B6/34
    • G02B6/34G02B6/122G02B6/124
    • Provided is a focusing waveguide grating coupler using a leaky mode which can form single output beam while relieving the dependency on manufacturing processes. The focusing waveguide grating coupler of the present research includes: a substrate having a first refraction index n1; a first core layer having a second refraction index n2, the first core layer being formed on the substrate; a second core layer having a third refraction index n3, the second core layer being formed on the first core layer apart from the first core layer with a space d in between; a first cladding layer having a fourth refraction index n4, the first cladding layer being formed on the second core layer; a second cladding layer having a fifth refraction index n5, the second cladding layer being formed on the first cladding layer and inserted between the first core layer and the second core layer; and a Fresnel lens positioned on the second cladding layer, wherein the refractive indexes satisfy conditions of n5>(n2, n3)>n1 and n5>n4; and light inputted through the first and second core layers to the Fresnel lens as radiated leaky beam by a leaky mode formed according to the conditions, and the leaky beam forms an optical focus by performing single directional coupling.
    • 提供了一种使用泄漏模式的聚焦波导光栅耦合器,其可以形成单个输出光束,同时减轻对制造工艺的依赖性。 本研究的聚焦波导光栅耦合器包括:具有第一折射率n1的衬底; 具有第二折射率n2的第一芯层,所述第一芯层形成在所述基板上; 具有第三折射率n3的第二芯层,所述第二芯层与所述第一芯层分开形成在所述第一芯层上,其间具有空间d; 具有第四折射率n4的第一包层,所述第一包层形成在所述第二芯层上; 具有第五折射率n5的第二包层,所述第二包层形成在所述第一包层上并插入在所述第一芯层和所述第二芯层之间; 和位于第二包覆层上的菲涅尔透镜,其中折射率满足n5>(n2,n3)> n1和n5> n4的条件; 以及通过第一和第二核心层通过根据条件形成的泄漏模式作为辐射泄漏波束通过第一和第二核心层输入到菲涅耳透镜的光,并且通过执行单向耦合来形成光学焦点。