物理学报2011，Vol.60Issue(1)：284-289,6.
双光反馈半导体激光混沌系统中外腔延时反馈特征的抑制
Suppression of time delay feedback signatures in a semiconductor laser with double optical feedback
摘要
Abstract
In a double optical feedback semiconductor laser chaotic system, by fixing the feedback time and feedback strength of the one mirror ( named as fixed cavity M1 ), the influences of the feedback time and feedback strength of the other mirror (named as tunable cavity M2 ) on the time delay feedback signatures of the chaotic system have been investigated experimentally.The results show that, for the case of the two cavities with identical feedback strengths, time delay feedback signatures of chaotic output can be suppressed efficiently when the cavity length of M2 is approximately equal (but can not exactly equal) to the cavity length of M1 (or half of the cavity length of M1 ).Fixing the length of M2 to approximately equal to the cavity length of M1 ( or half of the cavity length of M1 ), the time delay feedback signature suppression can be further improved through adjusting the feedback strength of M2 carefully.Therefore, adopting a double optical feedback semiconductor laser chaotic system can make the system behave with higher security due to the efficient hiding of delay feedback parameter of the system.关键词
半导体激光器/双光反馈/混沌输出/延时特征Key words
semiconductor laser/ double optical feedback/ chaotic output/ delay time signatures引用本文复制引用
丁灵,吴加贵,夏光琼,沈金亭,李能尧,吴正茂..双光反馈半导体激光混沌系统中外腔延时反馈特征的抑制[J].物理学报,2011,60(1):284-289,6.基金项目
国家自然科学基金(批准号:60978003,61078003,11004161)和西南大学中央高校基本科研业务费专项资金(编号:XDJK2009B010)资助的课题. （批准号:60978003,61078003,11004161）
