Wang Zhongxi, Zhang N, Yuan X-C
Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science & Technology, Ministry of Education of China, Nankai University, Tianjin, China.
Opt Express. 2011 Jan 17;19(2):482-92. doi: 10.1364/OE.19.000482.
We report an approach to the increase of signal channels in free-space optical communication based on composed optical vortices (OVs). In the encoding process, conventional algorithm employed for the generation of collinearly superimposed OVs is combined with a genetic algorithm to achieve high-volume OV multiplexing. At the receiver end, a novel Dammann vortex grating is used to analyze the multihelix beams with a large number of OVs. We experimentally demonstrate a digitized system which is capable of transmitting and receiving 16 OV channels simultaneously. This system is expected to be compatible with a high-speed OV multiplexing technique, with potentials to extremely high-volume information density in OV communication.
我们报告了一种基于合成光学涡旋（OVs）来增加自由空间光通信中信号通道的方法。在编码过程中，用于生成共线叠加光学涡旋的传统算法与遗传算法相结合，以实现大容量光学涡旋复用。在接收端，一种新型达曼涡旋光栅用于分析具有大量光学涡旋的多螺旋光束。我们通过实验演示了一个能够同时发送和接收16个光学涡旋通道的数字化系统。该系统有望与高速光学涡旋复用技术兼容，在光学涡旋通信中具有实现极高信息密度的潜力。
