title: Generation of wideband chaos with suppressed time-delay signature by delayed self-interference.
abstract: We demonstrate experimentally and numerically a method using the incoherent delayed self-interference (DSI) of chaotic light from a semiconductor laser with optical feedback to generate wideband chaotic signal. The results show that, the DSI can eliminate the domination of laser relaxation oscillation existing in the chaotic laser light and therefore flatten and widen the power spectrum. Furthermore, the DSI depresses the time-delay signature induced by external cavity modes and improves the symmetry of probability distribution by more than one magnitude. We also experimentally show that this DSI signal is beneficial to the random number generation.
authors.affiliation: Key Laboratory of Advanced Transducers & Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China.
authors.forename: Anbang
authors.initials: A
authors.lastname: Wang
authors.forename: Yibiao
authors.initials: Y
authors.lastname: Yang
authors.forename: Bingjie
authors.initials: B
authors.lastname: Wang
authors.forename: Beibei
authors.initials: B
authors.lastname: Zhang
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.forename: Yuncai
authors.initials: Y
authors.lastname: Wang
mesh_terms: D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D054023:Lasers, Semiconductor; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D009991:Oscillometry / Q000379:methods*; D012542:Scattering, Radiation