Finite-Difference Beam Propagation Method Based on the Generalized Douglas Scheme for a Nonuniform G - IEEE Photonics Technology Letters
نویسندگان
چکیده
The finite-difference beam propagation method based on the Douglas scheme is extended to a nonuniform grid. The truncation error is reduced to ~ ( A z ) ~ , provided the grid growth factor is r = 1 + ~ ( A z ) , while maintaining a tridiagonal matrix. The numerical results show that the accuracy is improved as compared with that obtained from the conventional nonuniform Crank-Nicholson scheme. Zndex TermsFinite-difference methods, optical propagation, optical waveguides.
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