Experimental demonstration of a 200-Gbit/s free-space optical link by multiplexing Laguerre–Gaussian beams with different radial indices

作者：Guodong Xie, Yongxiong Ren, Yan Yan, Hao Wei Huang, Nisar R. Ahmed, Long Li, Zhe Zhao, Changjing Bao, Moshe Tur, Solyman Ashrafi, Alan Eli Willner · 发表于：Optics Letters · 年份：2016 · DOI：10.1364/ol.41.003447 · 被引用次数：113 · 研究领域：Orbital Angular Momentum in Optics、Photonic and Optical Devices、Optical Wireless Communication Technologies

We demonstrate a 200-Gbit/s space-division multiplexing system using two Laguerre–Gaussian (LG) beams with different radial indices (LGℓ=0,p=0 and LGℓ=0,p=1). With a proper design of the radial change of the demultiplexing pattern, the channel crosstalk could be minimized and both channels could achieve a bit error rate of 3.8×10−3. Moreover, the multiplexing of four LG beams with different azimuthal indices and different radial indices (e.g., LGℓ=0,p=0, LGℓ=0,p=1, LGℓ=1,p=0, and LGℓ=1,p=1 beams) is also demonstrated with a <−12 dB channel crosstalk, potentially enabling a 400-Gbit/s data transmission.