Numerical gradient-index design for coherent mode conversion

被引：12

作者：

Lin, Di ^{[1
]}

Leger, James R. ^{[1
]}

机构：

[1] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55417 USA

来源：

ADVANCED OPTICAL TECHNOLOGIES | 2012年 / 1卷 / 03期

关键词：

beam shaper; GRIN; inhomogeneous; mode conversion; ray trace;

D O I：

10.1515/aot-2012-0011

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a numerical gradient-index (GRIN) design methodology for application in coherent mode conversion. Within the framework of geometric optics, a one-to-one correspondence between the fi eld description and the ray description of the propagating beam is established using optical path lengths and the conservation of energy within a bundle of rays. A family of ray paths is chosen to transform the initial ray distribution into a target ray distribution. The specifi ed ray paths are used to calculate the index profi le of the GRIN structure required to effect the gradual transformation from the input beam to the desired output beam. We demonstrate our approach with a GRIN structure design that converts a Gaussian beam into a fl at-top beam.

引用

页码：195 / 202

页数：8

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