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    • 7. 发明申请
    • SILICON NANOTAPER COUPLERS AND MODE-MATCHING DEVICES
    • 硅纳米粒子耦合器和模式匹配器件
    • WO2005077110A2
    • 2005-08-25
    • PCT/US2005004507
    • 2005-02-10
    • SIOPTICAL INCGHIRON MARGARETGOTHOSKAR PRAKASHMONTGOMERY ROBERT KEITHPATEL VIPULKUMARPATHAK SOHAMSHASTRI KALPENDUYANUSHEFSKI KATHERINE A
    • GHIRON MARGARETGOTHOSKAR PRAKASHMONTGOMERY ROBERT KEITHPATEL VIPULKUMARPATHAK SOHAMSHASTRI KALPENDUYANUSHEFSKI KATHERINE A
    • G02B6/122G02B6/14G02B6/26G02B6/34G02B6/42
    • G02B6/1228G02B6/4204
    • An arrangement for providing optical coupling between a free-space propagating optical signal and an ultrathin silicon waveguide formed in an upper silicon layer of a silicon-on-insulator (SOI) structure includes a silicon nanotaper structure formed in the upper silicon layer (SOI layer) of the SOI structure and coupled to the ultrathin silicon waveguide. A dielectric waveguide coupling layer, with a refractive index greater than the index of the dielectric insulating layer but less than the refractive index of silicon, is disposed so as to overly a portion of the dielectric insulating layer in a region where an associated portion of the SOI layer has been removed. An end portion of the dielectric waveguide coupling layer is disposed to overlap an end section of the silicon nanotaper to form a mode conversion region between the free-space propagating optical signal and the ultrathin silicon waveguide. A free-space optical coupling arrangement (such as a prism or grating) is disposed over the dielectric waveguide coupling layer and used to couple a propagating optical signal between free space and the dielectric waveguide coupling layer and thereafter into the ultrathin silicon waveguide.
    • 用于在自由空间传播的光信号和形成在绝缘体上硅(SOI))结构的上硅层中的超薄硅波导之间提供光耦合的装置包括形成在上硅层(SOI层)中的硅纳米锥结构 )和耦合到超薄硅波导。 具有大于介电绝缘层的折射率但小于硅的折射率的折射率的介质波导耦合层被布置成过度地在介电绝缘层的一部分中的相关部分 SOI层已被去除。 电介质波导耦合层的端部设置成与硅纳米锥的端部部分重叠以在自由空间传播的光信号和超薄硅波导之间形成模式转换区域。 自由空间光耦合装置(诸如棱镜或光栅)设置在介质波导耦合层之上,用于将传播的光信号耦合在自由空间与介质波导耦合层之间,然后耦合到超薄硅波导中。