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Optimization of phase objects in 4f coherent imaging system for nonlinear refraction measurements

  • Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

We numerically analyze the effects of radius and phase shift of phase objects on the diffraction image of the 4f coherent imaging system, a system used for measuring the third-order nonlinear refractive index. The selection of the aperture radius is discussed. We prove that when the phase object radius is 0.1 time of the aperture radius and the phase change of the phase object is 0.57π, one can get the highest sensitivity for nonlinear refraction measurement.

Original languageEnglish
Pages (from-to)686-690
Number of pages5
JournalOptics Communications
Volume266
Issue number2
DOIs
StatePublished - 15 Oct 2006

Keywords

  • 4f imaging system
  • Phase objects
  • Third-order nonlinear refractive index
  • Top-hat beam

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