Phase-shifted Bragg grating filters with symmetrical structures
Phase-shifted Bragg grating filters with symmetrical structures
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DOI：
10.1109/50.618363
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发表时间：
1997-08
影响因子：
4.7
通讯作者：
Li Wei;J. Lit
中科院分区：
文献类型：
--
作者：
Li Wei;J. Lit
对复合相移均匀光纤光栅滤波器进行了全面的理论分析。的传输特性进行了检查的传输矩阵制定。结果表明，这种滤波器的透射光谱是由光栅长度的比例显着控制。通过适当地选择该比率，可以获得准平顶光谱。导出了最优情形的一般条件。这一特性使得复合相移均匀FBG滤波器在波长复用光纤通信系统中的应用特别有利。
A comprehensive theoretical analysis of the compound phase-shifted uniform fiber Bragg grating (FBG) filter is presented. The transmission characteristics are examined by a transfer matrix formulation. It is shown that the transmission spectrum of such a filter is significantly controlled by the ratio of the grating lengths. By suitably choosing the ratio, a quasi-flat-top spectrum may be obtained. The general condition for the optimum case is derived. This characteristic makes the compound phase-shifted uniform FBG filter particularly advantageous for applications in wavelength-multiplexed optic-fiber communication systems.