Multi channel narrowband DWDM optical filters based on generalized aperiodic Thue-Morse structures

2009 International Symposium on Optomechatronic Technologies Pub Date : 2009-11-10 DOI:10.1109/ISOT.2009.5326072

Ali Rostami, S. Z. Gharamaleki, H. Banaei, A. Haddadpour, Ahmad Ghanbari, Farrokh Janabi-Sharifi

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Abstract

An In this paper a multi channel narrow band DWDM filter based on aperiodic Thue-Morse (TM) multilayer structure is proposed. We study the transmission spectra of light propagation through these structures. Our numerical simulation shows an ultra high efficiency for this filter so that the total transmission of filter output channels up to 100% and the range of output wavelength is 1550 nm which is suitable for DWDM communication systems. By studying the effects of parameters of aperiodic Thue-Morse structure, we realized that with varying the parameters such as number of layers, the distance between layers, the refractive index of layers, and so etc., we can accomplish a suitable DWDM filter and the structure properties are changeable with them. For example, by increasing the distance between each layer, the bandwidth of output channels less than 1nm is obtained. The main advantage of Thue-Morse structure is the selectable layer numbers of it, that in our designed structure, we generalized the base structure and choose TM(3,2) that means m=3 and n=2 in BmAn.

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基于广义非周期Thue-Morse结构的多通道窄带DWDM光滤波器

本文提出了一种基于非周期Thue-Morse (TM)多层结构的多通道窄带DWDM滤波器。我们研究了光通过这些结构时的透射光谱。数值模拟结果表明，该滤波器具有超高的效率，输出信道的总传输率可达100%，输出波长范围为1550 nm，适用于DWDM通信系统。通过对非周期Thue-Morse结构参数影响的研究，发现通过改变层数、层间距离、层间折射率等参数，可以得到合适的DWDM滤波器，其结构特性也随这些参数的变化而变化。例如，通过增加每层之间的距离，可以获得小于1nm的输出通道带宽。Thue-Morse结构的主要优点是层数的可选择性，在我们设计的结构中，我们推广了基础结构，选择了TM(3,2)，即BmAn中m=3, n=2。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2009 International Symposium on Optomechatronic Technologies

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