双通道加密自由空间光通信系统  

Dual channel encrypted free-space optical communication system

作　　者：王国庆 闵锐 李兴泉 张海平[1] 赵方 邵理阳 沈平 Wang Guoqing;Min Rui;Li Xingquan;Zhang Haiping;Zhao Fang;Shao Liyang;Shen Ping(School of Microelectronics,Shenzhen Institute of Information Technology,Shenzhen,Guangdong 518172,China;Center for Cognition and Neuroergonomics,State Key Laboratory of Cognitive Neuroscience and Learning,Beijing Normal University at Zhuhai,Zhuhai,Guangdong 519087,China;Department of Electronic and Electrical Engineering,Southern University of Science and Technology,Shenzhen,Guangdong 518055,China)

机构地区：[1]深圳信息职业技术学院微电子学院,广东深圳518172 [2]北京师范大学珠海校区认知神经科学与学习国家重点实验室认知神经工效研究中心,广东珠海519087 [3]南方科技大学电子与电气工程系,广东深圳518055

出　　处：《光电工程》2024年第9期39-48,共10页Opto-Electronic Engineering

基　　金：国家重点研发计划项目(2022YFE0140400);广东省科技计划项目(2021A0505080002)。

摘　　要：本文提出了一种基于压缩感知和倾斜光纤光栅的双通道加密自由空间光通信系统,不仅可以大量减少数据采集量,还可以对自由空间传输的数据进行加密,提高了系统的安全性。此外,我们的方案可以采用低带宽和低成本的光电探测器和模数转换器,降低了数据采集量和数据通信的成本。同时,本方案采用了一种倾斜角度为45°的倾斜光纤光栅同时作为空间光发射器、空间光侧面衍射器件和偏振敏感器件,加强了系统的集成度,降低了系统体积,同时提高了系统的能量利用效率。经实验表明,利用频率为1 GHz和3 GHz的正弦射频信号进行3.9 m的数据传输,在时域和频域的数据压缩比为16%和8%。A dual channel encrypted free-space optical communication system based on compressive sensing and tilted fiber grating is proposed.This approach not only greatly reduces the data acquisition volume,but also enhances the security of the system since the data transmitted in the free-space is encrypted.Besides,our proposal adopts low-bandwidth and low-cost photodetectors and analog-to-digital convertors,decreasing the data acquisition volume and the cost of data transmission.Also,the approach utilizes the tilted fiber grating with a 45°tilted angle as the free-space light emitter,free-space light lateral diffraction device,and polarization-sensitive device,simultaneously.The utilization of 45°tilted fiber grating greatly enhances the systematic integration,reduces the volume of the system and improves the energy efficiency of the system.A demonstration shows that two 1 GHz and 3 GHz sinusoidal signals are employed for the 3.9 m free-space data transmission with data compression ratios of 16%and 8%achieved both in the time domain and frequency domain.

关 键 词：衍射光栅 自由空间光通信 调制 光学安全和加密 

分 类 号：O438[机械工程—光学工程]