Abstract

An external-cavity semiconductor laser (ECSL) outputs high-dimensional chaos, which has potential for various applications, but the unwanted time-delay signature (TDS) might compromise the performance. In this work, a highly integrated and extensible framework of phased-array semiconductor lasers, operating in a steady state when isolated, is employed to postprocess the original chaos generated by an ECSL. Our results demonstrate that such a compact active device enables TDS suppression over wide parameter space. Better performance can be achieved in the proposed scheme compared with the conventional, discrete semiconductor laser subjected to optical chaotic injection. The influence of the injection parameters and the laser separation is studied, which further confirms the feasibility of the proposed scheme for TDS suppression. The phased array can be readily extended to include a large number of elements, and thus the current scheme allows for the generation of multiple independent chaotic signals with no discernible TDS in parallel. This means that the current study may pave the way for parallel random number generation based on optical chaos.

© 2020 Optical Society of America

Simultaneous bandwidth-enhanced and time delay signature-suppressed chaos generation in semiconductor laser subject to feedback from parallel coupling ring resonators

Ning Jiang, Yajun Wang, Anke Zhao, Shiqin Liu, Yiqun Zhang, Lu Chen, Baochuan Li, and Kun Qiu
Opt. Express 28(2) 1999-2009 (2020)

Generation of broadband chaos with perfect time delay signature suppression by using self-phase-modulated feedback and a microsphere resonator

Ning Jiang, Anke Zhao, Shiqin Liu, Chenpeng Xue, Boyang Wang, and Kun Qiu
Opt. Lett. 43(21) 5359-5362 (2018)

Enhancing time-delay suppression in a semiconductor laser with chaotic optical injection via parameter mismatch

Renheng Zhang, Pei Zhou, Yigong Yang, Qi Fang, Penghua Mu, and Nianqiang Li
Opt. Express 28(5) 7197-7206 (2020)

Security-enhanced chaos communication with time-delay signature suppression and phase encryption

Chenpeng Xue, Ning Jiang, Yunxin Lv, Chao wang, Guilan Li, Shuqing Lin, and Kun Qiu
Opt. Lett. 41(16) 3690-3693 (2016)

Optically injected nanolasers for time-delay signature suppression and communications

Pei Jiang, Pei Zhou, Nianqiang Li, Penghua Mu, and Xiaofeng Li
Opt. Express 28(18) 26421-26435 (2020)