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Optimizing fiber Bragg gratings using a genetic algorithm with fabrication-constraint encoding

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5 Author(s)
G. Tremblay ; Dept. of Phys., Univ. Laval, Quebec, Canada ; J. -N. Gillet ; Y. Sheng ; M. Bernier
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We propose an advanced genetic algorithm (GA) to design fiber Bragg gratings (FBGs) with given fabrication constraints. Our GA is enhanced by a new Fourier-series-based real-valued encoding to obtain more degrees of freedom and a rank-based fitness function. The new GA enables us to remove phase shifts in the gratings. The designed minimum-dispersion bandpass grating has a dispersion of ±28 ps/nm in the 0.33-nm flat-top passband. The grating is fabricated using a phase mask without phase shift.

Published in:

Journal of Lightwave Technology  (Volume:23 ,  Issue: 12 )