High order spatial mode optical fiber
    1.
    发明授权
    High order spatial mode optical fiber 失效
    高阶空间模式光纤

    公开(公告)号:US06418256B1

    公开(公告)日:2002-07-09

    申请号:US09510027

    申请日:2000-02-22

    IPC分类号: G02B602

    摘要: The invention relates to method and apparatus for transmitting an optical signal having optical energy substantially in a high order spatial mode. The optical waveguide, in one embodiment, includes a few mode fiber designed to have specific transmission characteristics for supporting the single high order spatial mode, and the few mode fiber transmits the single high order spatial mode. The optical waveguide, in one embodiment, has a dispersion and a dispersion slope for a given transmission bandwidth. Another aspect of the invention includes a method for transmitting an optical signal having optical energy substantially in a single high order spatial mode. The method includes the steps of providing a few mode fiber, which supports optical energy in the single high order spatial mode. In one embodiment, the single high order spatial mode is the LP02 spatial mode In another embodiment, the few mode fiber supports an optical signal having optical energy having less than twenty spatial modes.

    摘要翻译: 本发明涉及用于发送具有基本上处于高阶空间模式的光能的光信号的方法和装置。 在一个实施例中,光波导包括被设计为具有用于支持单个高阶空间模式的特定传输特性的少数模式光纤,并且少数模式光纤传输单个高阶空间模式。 在一个实施例中,光波导具有用于给定传输带宽的色散和色散斜率。 本发明的另一方面包括一种用于发送具有基本上以单个高阶空间模式的光能的光信号的方法。 该方法包括提供在单一高阶空间模式中支持光能的几种模式光纤的步骤。 在一个实施例中,单个高阶空间模式是LP02空间模式。在另一实施例中,少数模式光纤支持具有小于二十个空间模式的具有光能的光信号。

    Reducing mode interference in transmission of LP02 Mode in optical fibers
    2.
    发明授权
    Reducing mode interference in transmission of LP02 Mode in optical fibers 失效
    减少光纤中LP02模式传输的干扰

    公开(公告)号:US06327403B1

    公开(公告)日:2001-12-04

    申请号:US09464629

    申请日:1999-12-17

    IPC分类号: G02B626

    摘要: An optical waveguide supporting a plurality of modes including an absorbing annulus which attenuates a desired mode to a lesser degree than any other mode in the plurality of modes. In one embodiment, the absorbing annulus is disposed in the core of the waveguide. In another embodiment, the annulus is concentric about the core. In another embodiment, the annulus has a predetermined width and radius. In yet another embodiment the desired mode includes the LP02 mode.

    摘要翻译: 一种支持多个模式的光波导,包括吸收环,其将期望模式衰减到比多个模式中的任何其它模式更小的程度。 在一个实施例中,吸收环设置在波导的芯中。 在另一个实施例中,环与芯相同心。 在另一个实施例中,环具有预定的宽度和半径。 在另一个实施例中,期望的模式包括LP02模式。

    Reducing mode interference in transmission of a high order mode in optical fibers
    3.
    发明授权
    Reducing mode interference in transmission of a high order mode in optical fibers 失效
    降低光纤中高阶模式传输的干扰

    公开(公告)号:US06434311B1

    公开(公告)日:2002-08-13

    申请号:US09481428

    申请日:2000-01-12

    IPC分类号: G02B614

    摘要: An optical waveguide supporting a plurality of modes including an annulus which attenuates a desired mode to a lesser degree than any other mode in the plurality of modes. In one embodiment, the annulus is disposed in the core of the waveguide. In another embodiment, the annulus is concentric about the core. In another embodiment, the annulus has a predetermined width and radius. In yet another embodiment the optical waveguide includes an annulus that is disposed at a radial position corresponding to a region in the core in which the desired mode has substantially no energy. In yet another embodiment the desired mode includes the LP02 mode. In another embodiment, the annulus includes a scattering material. In still another embodiment, the annulus includes a conductive dopant material. Another embodiment includes a sharp change of refractive index within the core. Still other embodiments include disposing a region of increased refractive index in the core of the waveguide to attenuate undesired modes. Another embodiment includes disposing a region of decreased refractive index in the core of the waveguide to attenuate undesired modes. Other embodiments include combinations of annuli. These combinations of annuli can include, for example, absorbing annuli, scattering annuli, annuli comprising conductive dopant material, regions of increased refractive index, and regions of decreased refractive index or any combination thereof.

    摘要翻译: 支撑多个模式的光波导,包括将所需模式衰减到多个模式中的任何其他模式的程度较小的环。 在一个实施例中,环状物设置在波导的芯中。 在另一个实施例中,环与芯相同心。 在另一个实施例中,环具有预定的宽度和半径。 在另一个实施例中,光波导包括环形,其设置在对应于芯中的区域的径向位置处,其中期望模式基本上不具有能量。 在另一个实施例中,期望的模式包括LP02模式。 在另一个实施例中,环形空间包括散射材料。 在另一个实施方案中,环状物包括导电掺杂剂材料。 另一个实施例包括芯内折射率的急剧变化。 其他实施例包括在波导的芯中设置增加折射率的区域以衰减不期望的模式。 另一实施例包括在波导的芯中布置降低折射率的区域以衰减不期望的模式。 其他实施例包括环的组合。 环的这些组合可以包括例如吸收环,散射环,包含导电掺杂剂材料的环,折射率增加的区和折射率降低的区或其任何组合。

    Transverse mode transformer
    4.
    发明授权
    Transverse mode transformer 失效
    横模式变压器

    公开(公告)号:US06377726B1

    公开(公告)日:2002-04-23

    申请号:US09515959

    申请日:2000-02-29

    IPC分类号: G02B626

    摘要: The invention relates to apparatus and methods for transforming a spatial mode of an optical signal. The apparatus includes an optical phase element for imparting a predetermined spatially selective phase delay to the optical signal, and a mask in optical communication with the optical phase element. The mask, in one embodiment, includes an optically attenuating region disposed in a predetermined spatial pattern. In one aspect of the invention, the optical signal is transformed from a first spatial mode to a second spatial mode. In another aspect of the invention, the mask includes an absorbing material arranged in a predetermined spatial pattern. In yet another aspect of the invention, the mask includes a scattering material arranged in a predetermined spatial pattern. The invention also relates to a method for transforming a spatial mode of an optical signal. The method includes the step of receiving the optical signal having a first spatial mode with an intensity distribution and a phase. The method further includes the steps of selectively spatially attenuating the intensity distribution of the first spatial mode of the optical signal, selectively spatially delaying the phase of the optical signal, and propagating the selectively spatially attenuated and delayed optical signal. The first spatial mode of the optical signal is substantially transformed into a second spatial mode.

    摘要翻译: 本发明涉及用于变换光信号的空间模式的装置和方法。 该装置包括用于向光学信号赋予预定的空间选择性相位延迟的光学相位元件以及与光学相位元件光学通信的掩模。 在一个实施例中,掩模包括以预定空间图案布置的光学衰减区域。 在本发明的一个方面,光信号从第一空间模式变换为第二空间模式。 在本发明的另一方面,掩模包括以预定空间图案布置的吸收材料。 在本发明的另一方面,掩模包括以预定空间图案布置的散射材料。 本发明还涉及一种用于变换光信号的空间模式的方法。 该方法包括接收具有强度分布和相位的第一空间模式的光信号的步骤。 该方法还包括以下步骤:选择性地空间衰减光信号的第一空间模式的强度分布,选择性地空间延迟光信号的相位,并且传播选择性空间衰减和延迟的光信号。 光信号的第一空间模式基本上变换为第二空间模式。