解码方法
计算机科学
编码(内存)
传输(电信)
误码率
自由空间光通信
空间光调制器
光通信
光学
数据传输
调制(音乐)
电子工程
电信
物理
计算机网络
人工智能
工程类
声学
作者
Yifan Zhao,Andong Wang,Long Zhu,Shuang Zheng,Nan Zhou,Jing Du,Jian Wang
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-10-19
卷期号:48 (21): 5571-5571
摘要
Spatial domain of light beam is an important degree of freedom to be extensively explored. As a set of spatial domains, twisted lights have some natural properties such as orthogonality and security, providing great potentials in optical communications especially for data encoding/decoding. However, the speed of traditional spatial light modulators has always been criticized. Here we present a hundred-meter security free-space data transmission based on high-speed spatial light modulation by exploiting temporal-to-spatial domain mapping. We demonstrate 25-Gbit/s twisted light encoding/decoding and 260-m security free-space data transmission in the experiment. The encoding/decoding link will lead to 3-dB improvement in bit error rate (BER) performance compared with a single channel in theory and ∼1-dB optical signal-to-noise ratio (OSNR) penalty at the forward error correction (FEC) threshold of 3.8e-3 in practice. The experiment results also show favorable security performance of the proposed encoding/decoding link system.
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