title: Photonic ultrawideband signal generator using an optically injected chaotic semiconductor laser.
abstract: We propose and demonstrate a method to generate ultrawideband (UWB) signals in the optical domain based on the chaotic dynamics of an optically injected semiconductor laser with optical feedback. The chaotic-UWB pulses with a fractional bandwidth of 116% and central frequency of 6.88 GHz are experimentally generated by controlling the injection strength and frequency detuning of the chaotic laser. The spectrum of the UWB signals is in full compliance with the Federal Communications Commission spectral mask, and the experimental results are qualitatively consistent with the simulated results.
authors.affiliation: Institute of Optoelectronic Engineering, Department of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, China.
authors.forename: Ming-Jiang
authors.initials: MJ
authors.lastname: Zhang
authors.forename: Tie-Gen
authors.initials: TG
authors.lastname: Liu
authors.forename: An-Bang
authors.initials: AB
authors.lastname: Wang
authors.forename: Jian-Yu
authors.initials: JY
authors.lastname: Zheng
authors.forename: Li-Na
authors.initials: LN
authors.lastname: Meng
authors.forename: Zhao-Xia
authors.initials: ZX
authors.lastname: Zhang
authors.forename: Yun-Cai
authors.initials: YC
authors.lastname: Wang