The scheme of multi-wavelength output based on the gratings is proposed, which could be used as a multi-wavelength polarization filter in the density wavelength division multiplexed (DWDM) system.

• 基于这种光栅的多波长输出特性，我们提出了将它应用于密集波分复用系统中，用作多长偏振滤波器的方案。