%0 Journal Article
%T Propagation of Flattened Beams Through an Astigmatic Lens and Changes in Their Beam Parameters<br>平顶光束通过像散透镜的传输和光束参量的变化
%A ZHAO Bao-yin
%A L
%A <br>赵保银
%A 吕百达
%J 光子学报
%D 2008
%I 
%X The propagation of flattened beams through an astigmatic lens and changes in their beam parameters,such as the beam width,waist width and position,far-field divergence angle and M2 factor were studied.It is found that the astigmatism gives rise to an increase of the waist width and a decrease of the far-field divergence angle in the x direction,and the real focal position shifts far away from the lens.The results in the y direction are in contrary.The M2 factor of flattened beams is independent of the astigmatism.The relative errors of the beam width and far-field divergence angle vary with the beam order,astigmatic coefficient,Raleigh length and focal length of the lens.The relative errors of the beam width in the x and y directions at the geometric focal plane are equal if the beam orders in the two directions and initial beam width are equal,whereas they are different at the real focal plane.
%K Flattened beam
%K Astigmatic lens
%K Beam width
%K Far-field divergence angle
%K Relative error<br>平顶光束
%K 像散透镜
%K 束宽
%K 远场发散角
%K 相对误差
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=030D8B93DF83C85D8FEAF8D7BB7A5B3D&yid=67289AFF6305E306&vid=42425781F0B1C26E&iid=5D311CA918CA9A03&sid=C134FCA51C2CF9D8&eid=C3D6C7213B2FE390&journal_id=1004-4213&journal_name=光子学报&referenced_num=1&reference_num=11