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Observation of orbital angular momentum transfer between acoustic and optical vortices in optical fiber.

Authors
  • Dashti, Pedram Z
  • Alhassen, Fares
  • Lee, Henry P
Type
Published Article
Journal
Physical review letters
Publication Date
Feb 03, 2006
Volume
96
Issue
4
Pages
43604–43604
Identifiers
PMID: 16486822
Source
Medline
License
Unknown

Abstract

Acousto-optic interaction in optical fiber is examined from the perspective of copropagating optical and acoustic vortex modes. Calculation of the acousto-optic coupling coefficient between different optical modes leads to independent conservation of spin and orbital angular momentum of the interacting photons and phonons. We show that the orbital angular momentum of the acoustic vortex can be transferred to a circularly polarized fundamental optical mode to form a stable optical vortex in the fiber carrying orbital angular momentum. The technique provides a useful way of generating stable optical vortices in the fiber medium.

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