title: A robust random number generator based on differential comparison of chaotic laser signals.
abstract: We experimentally realize a robust real-time random number generator by differentially comparing the signal from a chaotic semiconductor laser and its delayed signal through a 1-bit analog-to-digital converter. The probability density distribution of the output chaotic signal based on the differential comparison method possesses an extremely small coefficient of Pearson's median skewness (1.5 × 10⁻⁶), which can yield a balanced random sequence much easily than the previously reported method that compares the signal from the chaotic laser with a certain threshold value. Moveover, we experimently demonstrate that our method can stably generate good random numbers at rates of 1.44 Gbit/s with excellent immunity from external perturbations while the previously reported method fails.
authors.affiliation: Institute of Optoelectronic Engineering, College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China.
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Zhang
authors.forename: Yuncai
authors.initials: Y
authors.lastname: Wang
authors.forename: Ming
authors.initials: M
authors.lastname: Liu
authors.forename: Lugang
authors.initials: L
authors.lastname: Xue
authors.forename: Pu
authors.initials: P
authors.lastname: Li
authors.forename: Anbang
authors.initials: A
authors.lastname: Wang
authors.forename: Mingjiang
authors.initials: M
authors.lastname: Zhang
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D017711:Nonlinear Dynamics; D011897:Random Allocation