Paper: May 05,2015
physics.optics
ID:1505.00706
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 the first study of stimulated Brillouin amplification (SBA) for
OAM beams, 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.
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Paper Author: Wei Gao,Chunyuan Mu,Hongwei Li,Yuqiang Yang,Zhihan Zhu
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