Impact of the chaotic semiconductor laser output power on time-delay-signature of chaos and random bit generation  

作　　者：Chenpeng Xue Xu Wang Likai Zheng Haoyu Zhang Yanhua Hong Zuxing Zhang 薛琛鹏;王绪;郑利凯;张昊宇;Yanhua Hong;张祖兴

机构地区：[1]College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China [2]School of Computer Science and Engineering,Bangor University,Bangor LL571UT,UK

出　　处：《Chinese Physics B》2025年第3期325-330,共6页中国物理B(英文版)

基　　金：Project supported in part by the National Natural Science Foundation of China(Grant Nos.62005129 and 62175116)。

摘　　要：We experimentally analyze the effect of the optical power on the time delay signature identification and the random bit generation in chaotic semiconductor laser with optical feedback.Due to the inevitable noise during the photoelectric detection and analog-digital conversion,the varying of output optical power would change the signal to noise ratio,then impact time delay signature identification and the random bit generation.Our results show that,when the optical power is less than-14 dBm,with the decreasing of the optical power,the actual identified time delay signature degrades and the entropy of the chaotic signal increases.Moreover,the extracted random bit sequence with lower optical power is more easily pass through the randomness testing.

关 键 词：CHAOS time delay signature entropy estimation random bit generation 

分 类 号：TN2[电子电信—物理电子学]