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 

机构地区：[1]College of Electronics and Information Engineering,Sichuan University,Chengdu 610064,China [2]Key Lab of Optical Fiber Sensing&Communications,University of Electronic Science&Technology of China,Chengdu 611731,China [3]School of Physics and Electronic Engineering,Sichuan Normal University,Chengdu 610101,China

出　　处：《Science China(Technological Sciences)》2021年第6期1295-1301,共7页中国科学（技术科学英文版）

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)。

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.

关 键 词：random fiber laser Rayleigh scattering random bit generation random laser 

分 类 号：TN248[电子电信—物理电子学]