A new beam propagation method based on least-squares expansion approximating | Zendy

Xia Jinsong | Zendy; Yu Jinzhong | Zendy

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A new beam propagation method based on least-squares expansion approximating

Author(s) -

Xia Jinsong,

Yu Jinzhong

Publication year - 2003

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.52.515

Subject(s) - taylor series , series expansion , beam (structure) , mathematics , least squares function approximation , selection (genetic algorithm) , point (geometry) , propagator , mathematical analysis , computer science , geometry , physics , statistics , optics , estimator , artificial intelligence , mathematical physics

A new finite difference wide-angle beam propagation method is developed by introducing the least-squares expansion approximant in the propagator expansion- In this new method it is not necessary to select the reference index point because of the whole region approaching the lease-square expansion- This method avoids the problems induced by error selection of the reference index in the old methods based on Taylor or Padè expansion- Several typical structures are simulated by the new method and the results prove the validity of it-

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