Synthesis of direct-coupled-resonators bandpass filters for WDM system. Melloni, A. & Martinelli, M. Journal of Lightwave Technology, 20(2):296-303, 2002.
Synthesis of direct-coupled-resonators bandpass filters for WDM system [link]Website  doi  abstract   bibtex   
A simple technique for the exact synthesis of selective bandpass\nfilters for wavelength division multiplexing (WDM) systems is presented.\nThe filters consist of direct-coupled ring resonators or cascaded Bragg\ngratings. The proposed technique permits the calculation of the physical\ndimensions of the optical structures given the desired frequency\nresponse of the filter in terms of bandwidth, free spectral range,\nout-of-band rejection, and frequency characteristic. The technique,\nexplained in detail for Butterworth and Chebyshev frequency responses,\nis exact, uses closed-form formulae, and is physically well based. The\nresulting devices are very compact, have a high out-of-band attenuation,\nand are suitable for high-density integrated optics. Several filters for\napplications such as channel add-drop, channel selection,\ndemultiplexing, multichannel filtering, and interleavers are designed,\nanalyzed, and discussed in the paper
@article{
 title = {Synthesis of direct-coupled-resonators bandpass filters for WDM system},
 type = {article},
 year = {2002},
 keywords = {Bandpass filters,Cavity resonator filters,Integrated optics,Optical filters,Optical waveguide components,Waveguide gratings,Wavelength division multiplexing (WDM)},
 pages = {296-303},
 volume = {20},
 websites = {http://www.scopus.com/inward/record.url?eid=2-s2.0-0036474299&partnerID=tZOtx3y1},
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 abstract = {A simple technique for the exact synthesis of selective bandpass\nfilters for wavelength division multiplexing (WDM) systems is presented.\nThe filters consist of direct-coupled ring resonators or cascaded Bragg\ngratings. The proposed technique permits the calculation of the physical\ndimensions of the optical structures given the desired frequency\nresponse of the filter in terms of bandwidth, free spectral range,\nout-of-band rejection, and frequency characteristic. The technique,\nexplained in detail for Butterworth and Chebyshev frequency responses,\nis exact, uses closed-form formulae, and is physically well based. The\nresulting devices are very compact, have a high out-of-band attenuation,\nand are suitable for high-density integrated optics. Several filters for\napplications such as channel add-drop, channel selection,\ndemultiplexing, multichannel filtering, and interleavers are designed,\nanalyzed, and discussed in the paper},
 bibtype = {article},
 author = {Melloni, Andrea and Martinelli, Mario},
 doi = {10.1109/50.983244},
 journal = {Journal of Lightwave Technology},
 number = {2}
}

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