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Analysis of long-period waveguide grating arrays

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2 Author(s)
Y. Bai ; Dept. of Electr. Eng., City Univ. of Hong Kong, China ; Kin Seng Chiang

The authors analyze an array of long-period waveguide gratings with coupled-mode theory and show that the grating array can provide effective power transfer among the waveguides at specific wavelengths in the absence of evanescent-field coupling. In particular, they derive the general conditions for obtaining an arbitrary distribution of power splitting ratios among the waveguides and discuss several special cases. They also present a design example using practical waveguide parameters to demonstrate the feasibility of forming such grating arrays for the realization of multiport broadband couplers and add/drop multiplexers

Published in:

Journal of Lightwave Technology  (Volume:24 ,  Issue: 10 )