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http://dx.doi.org/10.7236/JIIBC.2013.13.1.77

Implementation of Distributed Feedback Filters using Cascaded Gratings with Different Period  

Ho, Kwang-Chun (Dept. of ICs Engineering, Hansung University)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.13, no.1, 2013 , pp. 77-82 More about this Journal
Abstract
The filtering characteristics of planar distributed feedback (DFB) waveguides composed by gratings with different period are solved using equivalent transmission-line network. To analyze explicitly its band-pass and resonance properties, a longitudinal modal transmission-line theory (L-MTLT) based on Floquet's theorem and Babinet's principle is newly developed. The numerical results reveal that this approach offers a simple and analytic algorithm to analyze the filtering characteristics of cascaded DFB structure with different period, and the bandwidth and side-lobe suppression of cascaded DFB filter are sensitively dependent on the variation of aspect ratio and the number of grating at each region.
Keywords
Equivalent Transmission-Line Network; DFB Filter; Floquet-Babinet's Principle;
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Times Cited By KSCI : 1  (Citation Analysis)
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