کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
732377 893244 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An efficient algorithm for strongly focused optical beams propagating in Kerr media
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
An efficient algorithm for strongly focused optical beams propagating in Kerr media
چکیده انگلیسی

Due to the lens-induced quadratic phase factor from converging lens, the beam-propagation method (BPM) is computationally expensive in simulations by the sampling theorem for lens-induced strongly focused beams propagating in nonlinear media. In the paper, we present a modified approach (MA) based on the separate envelope and lens-induced phase to only compute the envelope in the whole focal region. Then we demonstrate the correctness of MA analytically by the propagation of focused Gaussian beam and numerically by that of focused Super-Gaussian beam in linear media. Numerical simulations of strongly focused beams based on MA are in good agreement with those of BPM when propagating in Kerr media. The sampling requirement of MA which is similar with no lens-induced phase beam is lower than that of BPM which increases with the lens-induced chirp parameter and the propagation distance. Thus the computational efficiency can be greatly improved.


► We present a modified algorithm (MA) for nonlinear propagation of focused beam.
► Sampling number of focused beam by MA is the same as that of the non-focused beam.
► Correctness of MA is verified by analytical analysis and numerical simulations.
► Computational efficiency of MA is improved with the lens-induced chirp.
► The closer the distance to the focal point, the more efficient the MA.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics & Laser Technology - Volume 44, Issue 7, October 2012, Pages 2100–2105
نویسندگان
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