کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1538355 996609 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nonlinear beam shaper for femtosecond laser pulses, from Gaussian to flat-top profile
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Nonlinear beam shaper for femtosecond laser pulses, from Gaussian to flat-top profile
چکیده انگلیسی

We present a straightforward method to transform a spatially Gaussian femtosecond laser beam into a flat-top shaped beam. The proposed technique takes advantage of a nonlinear phase induced in positive Kerr medium followed by a simple optical system. The variation of the refractive index with the laser intensity creates a phase plate which induces changes in the beam profile after propagation; flat-top and doughnut profiles are observed. The shaping conditions are computed numerically and confirmed experimentally. The method does not introduce energy losses. The device is very simple, self-regulated, flexible and does not need a manufactured phase plate or precise alignment. This method can be useful for light-matter interaction and laser machining.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 283, Issue 14, 15 July 2010, Pages 2900–2907
نویسندگان
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