We propose an approach to generate and multiplex 7 OAM spatial modes using a ring fiber launched by the light from multiple single-mode fibers. The purity of each OAM mode is >99% and the total power efficiency of multiplexing is 70%.
© 2012 OSA
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.4230) Fiber optics and optical communications : Multiplexing
(050.4865) Diffraction and gratings : Optical vortices
Y. Yan, J. Yang, Y. Yue, M. R. Chitgarha, H. Huang, N. Ahmed, J. Wang, M. Tur, S. Dolinar, and A. Willner, "High-Purity Generation and Power-Efficient Multiplexing of Optical Orbital Angular Momentum (OAM) Modes in a Ring Fiber for Spatial-Division Multiplexing Systems," in Conference on Lasers and Electro-Optics 2012, OSA Technical Digest (online) (Optical Society of America, 2012), paper JTh2A.58.
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