Abstract
We investigate theoretically the possibility of retrieving the value of the time delay of a semiconductor laser with an external optical feedback from the analysis of its intensity time series. When the feedback rate is moderate and the injection current set such that the laser relaxation-oscillation period is close to the delay, then the time-delay identification becomes extremely difficult, thus improving the security of chaos-based communications using external-cavity lasers.
© 2007 Optical Society of America
Full Article | PDF ArticleMore Like This
Jia-Gui Wu, Guang-Qiong Xia, and Zheng-Mao Wu
Opt. Express 17(22) 20124-20133 (2009)
Romain Modeste Nguimdo, Guy Verschaffelt, Jan Danckaert, and Guy Van der Sande
Opt. Lett. 37(13) 2541-2543 (2012)
Jia-Gui Wu, Guang-Qiong Xia, Xi Tang, Xiao-Dong Lin, Tao Deng, Li Fan, and Zheng-Mao Wu
Opt. Express 18(7) 6661-6666 (2010)