Tokushima Masatoshi
Opt Lett. 2018 Feb 1;43(3):431-434. doi: 10.1364/OL.43.000431.
To achieve high spectral linearity, we developed a Fano-resonant graded-stub filter on the basis of a pillar-photonic-crystal (PhC) waveguide. In a numerical simulation, the availability of a linear region within a peak-to-bottom wavelength span was nearly doubled compared to that of a sinusoidal spectrum, which was experimentally demonstrated with a fabricated silicon-pillar PhC stub filter. The high linearity of this filter is suitable for optical modulators used in multilevel amplitude modulation.
为了实现高光谱线性度，我们基于柱形光子晶体（PhC）波导开发了一种法诺共振渐变短截线滤波器。在数值模拟中，与正弦光谱相比，在峰谷波长跨度内线性区域的可用性几乎提高了一倍，这一点通过制作的硅柱PhC短截线滤波器得到了实验验证。这种滤波器的高线性度适用于多级幅度调制中使用的光调制器。
