14 August 2003 Limits of DWDM with gratings and Fabry-Perots and alternate solutions
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High resolution DWDM devices based on the principles of gratings (planar, Bragg, AWG, etc.) and Fabry-Perots (etalon, Lummer-Gehrke plate, etc.) suffer from inherent limitations due to (i) temporal pulse stretching of data, and (ii) broadening of time integrated spectral (demuxed) fringes. While the relation, dνFdt >1, can account for these limitations, our analysis imply that dnF does not represent real, physical frequencies. We explain the broader implications of this interpretation in designing DWDM devices based on gratings and Fabry-Perots and illustrate how to use prisms, photonic crystals and non-linear devices for very high data rate per channel.
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Chandrasekhar Roychoudhuri, Chandrasekhar Roychoudhuri, DongIk Lee, DongIk Lee, Yongyuan Jiang, Yongyuan Jiang, Shigeo Kittaka, Shigeo Kittaka, Masatoshi Nara, Masatoshi Nara, Vladimir V. Serikov, Vladimir V. Serikov, Masahiro Oikawa, Masahiro Oikawa, "Limits of DWDM with gratings and Fabry-Perots and alternate solutions", Proc. SPIE 5246, Active and Passive Optical Components for WDM Communications III, (14 August 2003); doi: 10.1117/12.511984; https://doi.org/10.1117/12.511984

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