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    Twin waveguide based design for photonic integrated circuits
    47.
    发明授权
    Twin waveguide based design for photonic integrated circuits 失效

    公开(公告)号：US06381380B1

    公开(公告)日：2002-04-30

    申请号：US09337785

    申请日：1999-06-22

    Applicant: Stephen R. Forrest ,  Milind Gokhale ,  Pavel Studenkov

    Inventor： Stephen R. Forrest ,  Milind Gokhale ,  Pavel Studenkov

    IPC: G02B600

    CPC classification number: G02B6/12004 ,  B82Y20/00 ,  G02B6/12021 ,  G02B6/2813 ,  G02B2006/12121 ,  G02B2006/12178 ,  G02B2006/12195 ,  H01S5/1014 ,  H01S5/1032 ,  H01S5/1064 ,  H01S5/3403 ,  H01S5/34306 ,  H01S5/50

    Abstract: An asymmetric twin waveguide (ATG) structure is disclosed that significantly reduces the negative effects of inter-modal interference in symmetric twin-waveguide structures and which can be effectively used to implement a variety of optical devices. The ATG structure of the invention can be monolithically fabricated on a single epitaxial structure without the necessity of epitaxial re-growth. To achieve the ATG structure of the invention, the effective index of the passive waveguide in the ATG is varied from that of a symmetric twin waveguide such that one mode of the even and odd modes of propagation is primarily confined to the passive waveguide and the other to the active waveguide. The different effective indices of the two coupled waveguides result in the even and odd modes becoming highly asymmetric. As a result, the mode with the larger confinement factor in the active waveguide experiences higher gain and becomes dominant. In a further embodiment, the active waveguide is tapered to reduce coupling losses of the optical energy between the passive waveguide and the active waveguide. In a further embodiment, a grating region is incorporated atop the passive waveguide to select certain frequencies for transmission of light through the passive waveguide.

    Photonic integrated detector having a plurality of asymmetric waveguides
    49.
    发明授权
    Photonic integrated detector having a plurality of asymmetric waveguides 有权
    具有多个不对称波导的光子集成检测器

    公开(公告)号：US06330378B1

    公开(公告)日：2001-12-11

    申请号：US09717851

    申请日：2000-11-21

    Applicant: Stephen R. Forrest ,  Milind R. Gokhale ,  Pavel V. Studenkov

    Inventor： Stephen R. Forrest ,  Milind R. Gokhale ,  Pavel V. Studenkov

    IPC: G02B612

    CPC classification number: H01S5/0262 ,  G02B6/12002 ,  G02B6/12004 ,  G02B6/1228 ,  G02B6/30 ,  G02B2006/12123 ,  G02B2006/12195 ,  H01S5/1014 ,  H01S5/1032 ,  H01S5/1064

    Abstract: A photonic integrated circuit (PIC) device comprising two or more vertically stacked asymmetric waveguides is provided. A photo-detector PIC device comprises a coupling waveguide for providing low-coupling loss with an external optical fiber and for guiding primarily a first mode of light, a second waveguide vertically coupled to the first waveguide for guiding primarily a second mode of light having an effective index of refraction different from the first mode, and a photo-detector vertically coupled to the second waveguide. Light received at the coupling waveguide is moved into the second waveguide via a lateral taper in the second waveguide. The photo-detector PIC device may further comprise a third waveguide having an optical amplifier therein and positioned between the coupling waveguide and the second waveguide.

    Abstract translation: 提供了包括两个或更多个垂直堆叠的非对称波导的光子集成电路（PIC）器件。 光检测器PIC器件包括：耦合波导，用于提供与外部光纤的低耦合损耗并且用于主要引导第一模式的光;垂直耦合到第一波导的第二波导，用于主要引导具有 有效折射率不同于第一模式，以及垂直耦合到第二波导的光电检测器。 在耦合波导处接收的光通过第二波导中的横向锥度移动到第二波导中。 光检测器PIC器件还可以包括其中具有光学放大器并位于耦合波导和第二波导之间的第三波导。

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