A New Method for Interpreting the Effective Radius of Curvature: Two-Dimensional Case

曹清; 邓锡铭

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A New Method for Interpreting the Effective Radius of Curvature: Two-Dimensional Case

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摘要

Starting from the vector field theory,the expression of the time average energy flow densityof a paraxial scalar light beam is deduced.In terms of this expression,the x(or y)directional weighted deviation is reasonably defined between the real-beam wavefrontand an imaginary ellipsoidal wavefront which is used to replace the real-beam wavefront.It is proved that,when Rx and Ry are just the x and y directional effective radii of curvature,respectively,the ellipsoidal wavefront Le=x^(2)/(2Rx)+y^(2)/(2 Ry)is the best-fit one for the real-beam wavefront L.Finally,the above results are generalized for a general polychrornatic light beams. ~~展开▼~~

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《中国物理快报：英文版》 |1997年第6期|P.421-423|共3页

作者
曹清; 邓锡铭;
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作者单位

National Laboratory on High Power Laser and Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800;

National Laboratory on High Power Laser and Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800;

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原文格式 PDF

正文语种 chi

中图分类数学分析;

关键词
beam; directional; imaginary;

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A New Method for Interpreting the Effective Radius of Curvature: Two-Dimensional Case

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