%0 Journal Article
%T Evolution of Phase Singularities of Higher-order Bessel Beam Diffracted by Aperture<br>经光阑衍射的高阶贝塞耳光束位相奇点演化特性
%A REN Xiang-gui
%A L Bai-da
%A <br>任祥贵
%A 吕百达
%J 光子学报
%D 2009
%I 
%X The analytical expression for the propagation of higher-order Bessel beams through an aperture paraxial optical ABCD system was derived,which was used to study the evolution of phase singularities of a higher-order Bessel beam diffracted by an aperture.It shows that there always exists an optical vortex at the center of the diffracted higher-order Bessel beams and the topological change is conserved during the propagation,but the size of the vortex core varies with the aperture radius,propagation distance and beam number.Depending on the aperture radius and propagation distance,the circular edge dislocations may vanish or appear.
%K Singular optics
%K Higher-order Bessel beam
%K Diffraction by an aperture
%K Optical vortex
%K Circular edge dislocation<br>奇点光学
%K 高阶贝塞耳光束
%K 光阑衍射
%K 光涡旋
%K 圆刃型位错
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=FBFE459B6923FD8C289A12754004CDD3&yid=DE12191FBD62783C&vid=16D8618C6164A3ED&iid=0B39A22176CE99FB&sid=0F7768518993EDDE&eid=96A53C367B5173D7&journal_id=1004-4213&journal_name=光子学报&referenced_num=0&reference_num=15