Design of multichannel filters with each channel wavelength and bandwidth adjustable independently
Design of multichannel filters with each channel wavelength and bandwidth adjustable independently
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DOI：
10.1364/josab.27.000010
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发表时间：
2010
影响因子：
1.9
通讯作者：
W. Rao;Yanjun Song;C. Jin
中科院分区：
文献类型：
--
作者：
W. Rao;Yanjun Song;C. Jin
我们提出了一种基于谐振耦合理论的一维（1D）多通道滤波器设计的简单方法，该方法不仅可以独立选择每个通道的峰值频率，还可以独立选择品质因数（Q 值）。通过用于两通道、三通道和四通道滤波器设计的三个示例描述了该方法。额外的缺陷被对称地引入一维光子晶体的两侧——它可以产生与需要调谐的通道重叠的缺陷模式。这一缺陷使得这些通道的Q值降低但没有频移，而其他通道几乎保持不变。该方法对于每个通道和带宽独立可调的多通道滤波器的设计具有重要价值。
We present a simple method to design one-dimensional (1D) multichannel filters based on the resonant coupling theory, which can choose not only the peak frequency of each channel but also the quality factors (Q values) independently. This method is described by three samples for the design of two-channel, three-channel, and four-channel filters. An additional defect is introduced symmetrically into both sides of the 1D PhCs—it can generate defect modes that overlap with the channels that require tuning. This defect makes the Q values of these channels reduced but with no frequency shift, while the other channels almost keep invariant. The method is valuable for the design of multichannel filters with each channel and bandwidth adjustable independently.