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Efficient beam propagation techniques

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2 Author(s)
Yevick, D. ; Dept. of Electr. Eng., Queen''s Univ., Kingston, Ont., Canada ; Hermansson, B.

It is shown that suitable modifications of the free-space-propagation operator in the standard fast-Fourier-transform beam propagation procedure yield a far more rapid code in the context of semiconductor rib waveguide calculations. The procedure curtails the diffraction experienced by the high-order Fourier components of the electric field and mirrors the structure of the recently introduced finite-difference beam propagation algorithm. It is used to investigate the propagation losses of a Y-junction composed of single-mode rib waveguides and illuminated by its normalized guided mode

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Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 1 )