Observation of Orbital Angular Momentum Transfer between Acoustic and Optical Vortices in Optical Fiber

Pedram Z. Dashti, Fares Alhassen, and Henry P. Lee
Phys. Rev. Lett. 96, 043604 – Published 3 February 2006

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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  • Received 14 September 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.043604

©2006 American Physical Society

Authors & Affiliations

Pedram Z. Dashti, Fares Alhassen, and Henry P. Lee*

  • Department of Electrical Engineering and Computer Science, The Henry Samueli School of Engineering, University of California, Irvine, Irvine, California 92697, USA

  • *Electronic address: hplee@uci.edu

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Vol. 96, Iss. 4 — 3 February 2006

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