基于Si_(3)N_(4)微环混沌光频梳的Tbit/s并行实时物理随机数方案  

A Tbit/s parallel real-time physical random number scheme based on chaos optical frequency comb of Si_(3)N_(4)micro-ring

作　　者：王永博 唐曦[1,2] 赵乐涵 #张鑫[1,2] 邓进 吴正茂[1,2] 杨俊波[4] 周恒 吴加贵[1,2] 夏光琼[1,2] Wang Yong-Bo;Tang Xi;Zhao Le-Han;Zhang Xin;Deng Jin;Wu Zheng-Mao;Yang Jun-Bo;Zhou Heng;Wu Jia-Gui;Xia Guang-Qiong(School of Physical Science and Technology,Southwest University,Chongqing 400715,China;Chongqing Key Laboratory of Micro&Nano Structure Optoelectronics,Southwest University,Chongqing 400715,China;Key Lab of Optical Fiber Sensing and Communication Networks,University of Electronic Science and Technology of China,Chengdu 610097,China;Center of Material Science,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]西南大学物理科学与技术学院,重庆400715 [2]西南大学,微纳结构光电子学重庆市重点实验室,重庆400715 [3]电子科技大学,光纤传感与通信教育部重点实验室,成都610097 [4]国防科技大学物质与材料科学实验中心,长沙410073

出　　处：《物理学报》2024年第8期123-130,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61775184,61875167);重庆市自然科学基金杰出青年基金(批准号:cstc2021jcyj-jqX0027);西南大学创新研究2035先导计划(批准号:SWU-XDPY22012)资助的课题.

摘　　要：本文结合片上Si_(3)N_(4)超高Q微环的混沌光频梳和高速现场可编程门阵列,提出并实验验证了一种超高速的并行实时物理随机数方案.结果表明,Si_(3)N_(4)超高Q微环实验得到的光频梳齿包含数百个信道,通过调节Si_(3)N_(4)微环的工作状态使其处于光学混沌态,从而成为性能优良的物理熵源.采用现场可编程门阵列(FPGA)板载的多位模数转换器,对滤波后频梳的光混沌信号进行离散采样量化,生成8位二进制比特流.对该比特流进行实时的自延迟异或处理,并保留4位最低有效位,实验最终实现了单信道实时速率达5 Gbits/s的合格物理随机比特流.结合实验中数目达294的混沌光频梳齿,本方案的并行实时随机数的吞吐量可望达到1.74 Tbits/s.这些结果可为实时物理随机数源提供集成、超高速的新可选方案.Physical random numbers(PRNs)own various advantageous characteristics,including unpredictability,non-repeatability,higher security and reliability.Meanwhile,laser chaos has attracted great attention in the field of PRN.In terms of single channel PRN,laser chaos schemes can achieve a much higher bit-rate than traditional quantum PRN schemes.So far,various laser chaos PRN schemes have been discussed in order to enhance the performance of single channel laser chaos PRN.However,considering the limited bandwidth of laser chaos,especially the bandwidth of digital electronic circuit,the development potential of single channel PRN should be limited and may fall into the trap of high performance and expensive cost.Recently,the applications of multi-channel parallel PRN schemes have been developed.These parallel types may balance the high performance of PRN in a low cost.Recent progress indicates that chaotic micro-comb may have good potential.The micro-comb exhibits highly nonlinear and complex dynamic characteristics,and each comb tooth may show chaotic oscillation.The wavelength division multiplexing technology enables large-scale optical parallel output,providing the possiblity for large-scale parallel PRN generation.However,most of these PRN schemes are offline rather than true online and real-time random numbers.Thus,the development of real,online real-time parallel PRN solutions has great interest and research value in related fields.Herein we experimentally demonstrat an ultra-high-speed parallel real-time physical random number generator,which is achieved though the combination of chaotic micro-comb of chip-scale Si_(3)N_(4)ultra-high Q micro-resonator and a high-speed field programmable gate array(FPGA).The results show that the Si_(3)N_(4)ultrahigh Q micro-resonator generates a micro-comb with hundreds of channels,each channel can route into an optically chaotic state,and become an excellent physical entropy source.Using FPGA onboard multi-bit analogto-digital converter,the filtered optical chaos signal from the

关 键 词：物理随机数 实时 混沌 光频梳 现场可编程门阵列 

分 类 号：O415.5[理学—理论物理] TN24[理学—物理]