Beam shaping for CARS measurements in turbulent environments

Gaetano Magnotti*, Andrew D. Cutler, Paul M. Danehy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

This paper describes a new technique to mitigate the effect of beam steering on CARS measurements in turbulent, variable density environments. The new approach combines planar BOXCARS phasematching with elliptical shaping of one of the beams to generate a signal robust to beam steering, while keeping the same spatial resolution. Numerical and experimental results are provided to demonstrate the effectiveness of this approach. One experiment investigates the effect of beam shaping in the presence of a controlled and well quantified displacement of the beams at the focal plane. Another experiment, more qualitative, proves the effectiveness of the technique in the presence of severe beam steering due to turbulence.

Original languageEnglish (US)
Pages (from-to)4730-4741
Number of pages12
JournalApplied Optics
Volume51
Issue number20
DOIs
StatePublished - Jul 10 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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