Numerical design of three-dimensional gradient refractive index structures for beam shaping

W. Minster Kunkel, James R. Leger

Research output: Contribution to journalArticlepeer-review

Abstract

A numerical design method is demonstrated for gradient refractive index (GRIN) beam shapers embedded in a medium. The three-dimensional refractive index profile ∆n(x, y, z) gradually changes the spatial characteristics of a beam during propagation. Diffraction effects such as beam expansion are controlled and compensated by the refractive index profile, resulting in efficient field transformations with no coherent artifacts. The solution is found using phase retrieval and a paraxial scalar wave beam propagation model. An example design is shown in which small changes in refractive index (∆n < 10−3) are used to transform a beam over a device length of 10 mm.

Original languageEnglish (US)
Pages (from-to)32061-32076
Number of pages16
JournalOptics Express
Volume28
Issue number21
DOIs
StatePublished - Oct 12 2020

Bibliographical note

Publisher Copyright:
© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

PubMed: MeSH publication types

  • Journal Article

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