Photonic crystal waveguides and systems using such waveguides
    10.
    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

    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。