Doughnut-like beam generation of Laguerre-Gaussian mode with extremely high mode purity

Shu Chun Chu, Kenju Otsuka

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

An apparatus to achieve a single doughnut-like Laguerre-Gaussian (LG) mode with extremely high mode purity higher than 99.6% is reported. The proposed apparatus is a conceptual combination of a high-order HG mode selector and an astigmatic mode converter, which consists of only four simple and easily-made optical elements: three lens elements and one binary phase element. Theoretical simulations show that the apparatus has a good tolerance for both system production and alignment errors. With such high mode purity, the doughnut-like LG beam generated by the apparatus carrying an orbital angular momentum will be beneficial to numbers of studies including the trapping and rotating of micro and nano-particles, non-linear optics, and atom-light interaction.

Original languageEnglish
Pages (from-to)1647-1653
Number of pages7
JournalOptics Communications
Volume281
Issue number6
DOIs
Publication statusPublished - 2008 Mar 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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