基于数字化带宽增强混沌激光信号的高速随机源  

High Speed Random Number Generator Based on Digitizing Bandwidth-Enhanced Chaotic Laser Signal

作　　者：鄢秋荣[1] 曹青山[1] 赵宝升[2] 张华[1] 廖庆洪[1] 

机构地区：[1]南昌大学信息工程学院,江西南昌330031 [2]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西西安710119

出　　处：《中国激光》2015年第11期21-27,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(61007017);中国博士后科学基金(N2013M540536);江西省自然科学基金(20142BAB217006;20151BAB202016);江西省教育厅青年科学基金(GJJ14211);江西省博士后科研项目择优资助(2014KY18)

摘　　要：提出并验证了一种基于数字化带宽增强激光混沌信号的高速随机源。为消除光反馈半导体混沌激光信号中存在的弱周期性,将光反馈混沌半导体激光注入另一激光器产生的带宽增强混沌激光信号。用8 bit高速模数转换器对输出的增强带宽混沌激光信号进行采集,实现每个采样点产生多个随机位。为去除所提取原始随机位存在的偏差和提高随机位的产生效率,提出采用基于现场可编程逻辑阵列的安全哈希算法-256来提取随机位。采用4路并行处理技术获得了2.94 Gbit/s的在线随机数产生速率,每个采样点可平均产生4.65个随机比特位。所获的随机数通过了随机性测试程序ENT和STS中所有测试项。A high speed random number generator based on digitizing bandwidth-enhanced chaotic laser signal is proposed and demonstrated. In order to remove the weak periodicity in optical feedback chaotic semiconductor laser signal, the optical feedback chaotic semiconductor laser is injected into another semiconductor laser to obtain a bandwidth-enhanced chaotic laser signal. The bandwidth-enhanced chaotic laser signal is converted using an 8-bit high speed analog-to-digital convertor to achieve generating multi bits by each sampling point. In order to remove the bias existing in original extracted random bits and improve the efficiency of random bit generation, field- programmable gate array based secure hash algorithm 256 is proposed to extract random bit. Due to the use of 4-channel parallel processing technology, online random number generation rate of 2.94 Gbit/s is obtained and each sample could produce average 4.65 random bits. The obtained random numbers pass all the tests in random testing program of ENT and STS.

关 键 词：激光光学 混沌激光 随机数发生器 安全哈希算法 保密通信 

分 类 号：O436[机械工程—光学工程] TN918[理学—光学]