Parametric amplification of orbital angular momentum beams based on light-acoustic interaction
arXiv:1505.00706 · doi:10.1063/1.4927699
Abstract
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.
7 pages, 3 figures
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- Vectorial nonlinear optics: type-II second-harmonic generation driven by spin-orbit coupled fields
- Observation of reversible orbital angular momentum transfer based on photon-phonon coupling
- Dynamic tomography of the spin-orbit coupling in nonlinear optics
- Advances in laser-plasma interactions using intense vortex laser beams
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