We present two novel hybrid photonic structures made of silica that possess two well-separated frequency bandgaps. The addition of interstitial air holes in a precise location and size allows these bandgaps to open with a ratio of similar to 3 between their central frequencies at the air line ck(z)/w = 1, thus fulfilling the basic guidance condition for third harmonic generation in hollow-core fibers. In addition, these designs may serve for high-power laser delivery of two well-separated wavelengths, such as visible and near infrared. (C) 2014 Optical Society of America
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机译：我们介绍了两个具有两个良好分离的频带隙的二氧化硅制成的新型混合光子结构。在精确的位置和尺寸上增加间隙气孔可使这些带隙以空气管路ck（z）/ w = 1的中心频率之间的比率近似于3的比例打开，从而满足三次谐波的基本指导条件在空心纤维中产生。另外，这些设计可用于大功率激光传输两个波长完全分开的波长，例如可见光和近红外光。 （C）2014年美国眼镜学会
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