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Title: Parametric amplification of orbital angular momentum beams based on light-acoustic interaction

A high fidelity amplification of beams carrying orbital angular momentum (OAM) is very crucial for OAM multiplexing and other OAM-based applications. Here, we report a demonstration of stimulated Brillouin amplification for OAM beams, and the energy conversion efficiency of photon-phonon coupling and the phase structure of amplified signals are investigated in collinear and noncollinear frame systems, respectively. Our results demonstrate that the OAM signals can be efficiently amplified without obvious noise introduced, and the modes of output signal are independent of the pump modes or the geometrical frames. Meanwhile, an OAM state depending on the optical modes and the geometrical frames is loaded into phonons by coherent light-acoustic interaction, which reveals more fundamental significance and a great application potential in OAM-multiplexing.
Authors:
; ;  [1] ; ;  [2]
  1. Institute of Photonics and Optical Fiber Technology, Harbin University of Science and Technology, Harbin 150080 (China)
  2. The Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentation of Heilongjiang Province, Harbin 150080 (China)
Publication Date:
OSTI Identifier:
22486372
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLIFICATION; BEAMS; COUPLING; EFFICIENCY; ENERGY CONVERSION; NOISE; OPTICAL MODES; ORBITAL ANGULAR MOMENTUM; PHONONS; PHOTONS; SIGNALS; VISIBLE RADIATION