Series representation of the Gaussian beam far-field diffracted by annular aperture
Accurate, analytical series expressions for the far-field diffraction of a Gaussian beam normally incident on a circular and central obscured aperture are derived with the help of the integration of parts method. With this expression, the far-field intensity distribution pattern can be obtained and...
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Published in | Optik (Stuttgart) Vol. 119; no. 16; pp. 766 - 768 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Reutlingen
Elsevier GmbH
01.12.2008
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Accurate, analytical series expressions for the far-field diffraction of a Gaussian beam normally incident on a circular and central obscured aperture are derived with the help of the integration of parts method. With this expression, the far-field intensity distribution pattern can be obtained and the divergence angle is deduced too. Using the first five items of the series, the accuracy can satisfy most laser application fields. Compared with the conventional numerical integral method, the series representation is very convenient for understanding the physical meanings. |
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ISSN: | 0030-4026 1618-1336 |
DOI: | 10.1016/j.ijleo.2007.06.003 |