聚合物阵列波导光栅波分复用器带宽平坦化分析

Analysis for Passband Flatness of Arrayed Waveguide Grating Multiplexer

提出了一种阵列波导光栅(AWG)波分复用器带宽平坦化的有效方法。在常规型阵列波导器件中,把相邻奇数阵列波导长度差减少增量,并把相邻偶数阵列波导长度差增加相同的增量,即可获得平坦的箱形波谱响应。对17×17信道聚合物AWG波分复用器的模拟结果表明,箱形波谱响应的3 dB带宽约为0.49 nm,每条输出信道的串扰皆低于-28 dB。

An efficient technique is proposed to flatten the spectral response of an arrayed waveguide grating（AWG） multiplexer. By subtracting an increment from the length difference of odd arrayed waveguides and adding the same increment to that of even arrayed waveguides, a box-like spectral response can be obtained. The simulated result for a 17×17 polymer AWG shows that the box-like spectral response has a 3 dB bandwidth of 0.49 nm, and the crosstalk is about or less than -28 dB for every output channel.