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Chin. Opt. Lett.
 Home  List of Issues    Issue 01 , Vol. 05 , 2007    Study on the approximative formula for the far-field of a Gaussian beam under circular aperture diffraction and its divergence


Study on the approximative formula for the far-field of a Gaussian beam under circular aperture diffraction and its divergence
Hongzhan Liu, Ruisheng Liang, Xuguang Huang
Laboratory of Photonic Information Technology, [South China Normal University], Guangzhou 510006

Chin. Opt. Lett., 2007, 05(01): pp.4-7-4

DOI:
Topic:Diffraction and gratings
Keywords(OCIS Code): 050.0050  050.1970  

Abstract
The approximative formula for the far-field diffraction of a Gaussian beam through a circular aperture is obtained by using the superposition of Gaussian beams instead of the aperture function, and the explicit expression for calculating the beam divergence is also gained. Using the formula, the influences of the aberrations on the far-field wavefront and the beam's divergence are researched, and the results show that the large aberrations badly affect the far-field wavefront and the divergence. It is suggested that the aberrations and the diffractions should be avoided when designing the transmitter.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2006/8/10
Accepted:
Posted online:

Get Citation: Hongzhan Liu, Ruisheng Liang, Xuguang Huang, "Study on the approximative formula for the far-field of a Gaussian beam under circular aperture diffraction and its divergence," Chin. Opt. Lett. 05(01), 4-7-4(2007)

Note: This work was supported by the National "973" Program of China under Grant No. 2007CB307000 and 2007CB307001. H. Liu's e-mail address is lhzhan@yahoo.com.cn or yanluhongzhan@163.com.



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