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    Electromagnetic mode conversion in photonic crystal multimode waveguides
    7.
    发明授权
    Electromagnetic mode conversion in photonic crystal multimode waveguides 有权
    光子晶体多模波导中的电磁模式转换

    公开(公告)号：US06563981B2

    公开(公告)日：2003-05-13

    申请号：US10066234

    申请日：2002-01-31

    申请人： Ori Weisberg ,  Steven G. Johnson ,  John D. Joannopolous ,  Michael Shapiro ,  Yoel Fink ,  Mihai Ibanescu

    发明人： Ori Weisberg ,  Steven G. Johnson ,  John D. Joannopolous ,  Michael Shapiro ,  Yoel Fink ,  Mihai Ibanescu

    IPC分类号： G02B642

    CPC分类号： G02B6/023 ,  G02B6/02304 ,  G02B6/14

    摘要： A method for converting electromagnetic (EM) energy between guided modes of a photonic crystal waveguide having a waveguide axis, the method including: (i) providing the photonic crystal waveguide with a mode coupling segment comprising at least one bend in the waveguide axis, wherein during operation the mode coupling segment converts EM. energy in a first guided mode to a second guided mode; (ii) providing EM energy in the first guided mode of the photonic crystal waveguide; and (iii) allowing the EM energy in the first guided mode to encounter the mode coupling segment to convert at least some of the EM energy in the first guided mode to EM energy in the second guided mode.

    摘要翻译： 一种用于在具有波导轴的光子晶体波导的导向模式之间转换电磁（EM）能量的方法，所述方法包括：（i）为光子晶体波导提供包括波导轴线中的至少一个弯曲的模式耦合段，其中 在运行期间，模式耦合段转换EM。 第一导向模式中的能量到第二导向模式; （ii）在光子晶体波导的第一引导模式中提供EM能量; 以及（iii）允许第一引导模式中的EM能量遇到模式耦合段，以将第一引导模式中的至少一些EM能量转换为第二引导模式中的EM能量。

    Electromagnetic mode conversion in photonic crystal multimode waveguides
    8.
    发明授权
    Electromagnetic mode conversion in photonic crystal multimode waveguides 有权
    光子晶体多模波导中的电磁模式转换

    公开(公告)号：US06728439B2

    公开(公告)日：2004-04-27

    申请号：US10393897

    申请日：2003-03-21

    申请人： Ori Weisberg ,  Steven G. Johnson ,  John D. Joannopoulos ,  Michael Shapiro ,  Yoel Fink ,  Mihai Ibanescu

    发明人： Ori Weisberg ,  Steven G. Johnson ,  John D. Joannopoulos ,  Michael Shapiro ,  Yoel Fink ,  Mihai Ibanescu

    IPC分类号： G02B642

    CPC分类号： G02B6/023 ,  G02B6/02304 ,  G02B6/14

    摘要： A photonic crystal waveguide having multiple guided modes, the waveguide comprising: a dielectric confinement region surrounding a waveguide axis, the confinement region comprising a photonic crystal having at least one photonic band gap, during operation the confinement region guides EM radiation in a first range of frequencies to propagate along the waveguide axis; a dielectric core region extending along the waveguide axis and surrounded by the confinement region about the waveguide axis; and a mode coupling segment comprising at least one bend in the waveguide axis, wherein during operation the mode coupling segment converts EM energy in a first guided mode to a second guided mode with a conversion efficiency greater than 10% for a frequency in the first range of frequencies.

    摘要翻译： 一种具有多个导模的光子晶体波导，所述波导包括：围绕波导轴的介电限制区域，所述约束区域包括具有至少一个光子带隙的光子晶体，所述限制区域在操作期间引导EM辐射在第一范围 频率沿波导轴传播; 介质芯区域，沿着波导轴线延伸并围绕围绕波导轴线的限制区域围绕; 以及模式耦合段，其包括在所述波导轴线中的至少一个弯曲部分，其中在操作期间，所述模式耦合段将第一引导模式中的EM能量转换为第二引导模式，对于所述第一范围中的频率，转换效率大于10％ 的频率。

    Photonic crystal waveguides and systems using such waveguides
    9.
    发明授权
    Photonic crystal waveguides and systems using such waveguides 有权
    光子晶体波导和使用这种波导的系统

    公开(公告)号：US07231122B2

    公开(公告)日：2007-06-12

    申请号：US10978605

    申请日：2004-11-01

    申请人： Ori Weisberg ,  Steven A. Jacobs ,  Maksim Skorobogatiy ,  Steven G. Johnson ,  Uri Kolodny

    发明人： Ori Weisberg ,  Steven A. Jacobs ,  Maksim Skorobogatiy ,  Steven G. Johnson ,  Uri Kolodny

    IPC分类号： G02B6/02 ,  G02B6/26 ,  G02B6/032 ,  G02B5/30

    CPC分类号： G02B6/02304 ,  G02B6/02328 ,  G02B6/02361 ,  G02B6/03622 ,  G02B6/03688 ,  G02B6/03694

    摘要： In general, in one aspect, the invention features an apparatus that includes a photonic crystal fiber configured to guide a mode of electromagnetic radiation at a wavelength, λ, along a waveguide axis. The fiber includes a core extending along the waveguide axis, and a confinement region extending along the waveguide axis and surrounding the core. The confinement region includes alternating layers of a first and a second dielectric material having thicknesses d1 and d2 and different refractive indices n1 and n2, respectively. The thickness of at least one of the alternating layers of the first material differs from thickness d1QW or at least one of the alternating layers of the second material differs from thickness d2QW, where d1QW and d2QW correspond to a quarter-wave condition for the two dielectric materials given by d1QW=λ/(4√{square root over (n12−1)}) and d2QW=λ/(4√{square root over (n22−1)}), respectively. The photonic crystal fiber has an attenuation for the guided mode at the wavelength λ that is reduced by a factor of about two or more relative to an attenuation for a reference fiber that is identical to the photonic crystal fiber except that the reference fiber has alternating layer thicknesses corresponding to the quarter-wave condition.

    摘要翻译： 通常，在一个方面，本发明的特征在于一种装置，其包括光子晶体光纤，其被配置为沿波导轴引导波长λ的电磁辐射模式。 光纤包括沿波导轴延伸的芯，以及沿着波导轴线延伸并围绕芯的约束区域。 限制区域包括具有厚度d 1和2 2的不同折射率n 1和n 2的第一和第二介电材料的交替层，n 2 。 第一材料的至少一个交替层的厚度与厚度d不同，或者第二材料的至少一个交替层与厚度d不同 QW ，其中d <1> QW 和d <2> QW / SUP>对应于通过d 1给出的两个电介质材料的四分之一波长条件QW =λ/（4√{平方根超过（n <1） ＆lt; / SUB＆gt;＆lt; 2＆gt; 1）}）和d 2 QW 2 2 -1）}）。 光子晶体光纤对于在波长λ处的导模的衰减相对于与光子晶体光纤相同的参考光纤的衰减相比减小约两倍或更多的因子，除了参考光纤具有交替层 厚度对应于四分之一波长条件。