Ultra-high speed random bit generation based on Rayleigh feedback assisted ytterbium-doped random fiber laser

作     者：WU Han XIONG Ji HAN Bing WANG ZiNan ZHANG WeiLi JIA XinHong LIANG HouKun WU Han;XIONG Ji;HAN Bing;WANG ZiNan;ZHANG WeiLi;JIA XinHong;LIANG HouKun

作者机构：College of Electronics and Information EngineeringSichuan UniversityChengdu 610064China Key Lab of Optical Fiber Sensing&CommunicationsUniversity of Electronic Science&Technology of ChinaChengdu 611731China School of Physics and Electronic EngineeringSichuan Normal UniversityChengdu 610101China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2021年第64卷第6期

页      面：1295-1301页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：the Fundamental Research Funds for the Central Universities(Grant Nos.YJ201979&YJ201982) Sichuan Science and Technology Program(Grant No.2019YJ0530) Sichuan Provincial Project for Outstanding Young Science and Technology Scholars(Grant No.2020JDJQ0024)。 

主　　题：random fiber laser Rayleigh scattering random bit generation random laser 

摘      要：In this paper, we propose an ultra-high speed random bit generator without the time-delay signature based on an ytterbium-doped random fiber laser(YRFL) with Rayleigh scattering feedback. The spectrum of the YRFL has a relatively broad bandwidth(0.35 nm) and the lasing temporal intensity shows random fluctuations without cavity induced time-delay signatures(TDS),which are essential for ultra-high speed random bit generation. The chaotic signal and its time-delayed signal sampling at40 Giga samples per second(GS/s) are converted to digital 8-bit signals. By selecting 5 least significant bits from each 8-bit digital signal and using bitwise exclusive-OR operation, we experimentally achieve 200 Gbps physical random bit generation based on ytterbium-doped random fiber laser with the verified randomness. The combination of broadband emission and free of TDS makes random fiber lasers new promising sources for high performance random bit generation in a simple and compact configuration, which has a great potential in cryptography and secure communication applications.