Accurately identifying mode indices of Laguerre-Gaussian beams via weak measurements

Bo Wang, Pengyun Li, Tian Chen, Xiangdong Zhang

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We propose an efficient method to accurately identify two mode indices (p and l) of Laguerre-Gaussian (LG) beams simultaneously with weak value measurement (WVM). Concise relations between the spatial displacements from the WVM and two mode indices of LG beams have been obtained. Compared with the traditional measurements, the advantage of using our method is that LG beams with large p and l can be identified precisely. A joint spatial WVM with a looser approximate condition has been presented, which realizes better identification than the individual spatial WVM with correction terms or strict approximation. Furthermore, the signal-to-noise ratio (SNR) of the spatial WVM is also discussed.

Original languageEnglish
Article number055603
JournalJournal of Optics (United Kingdom)
Volume19
Issue number5
DOIs
Publication statusPublished - May 2017

Keywords

  • Laguerre-Gaussian beams
  • identification of mode indices
  • weak value measurement

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